Summary
Overview
Work history
Education
Skills
References
Accomplishments
Courses
Timeline
Generic
Jason Mayren

Jason Mayren

Lead Investigator
Bamber Bridge,Lancashire

Summary

Experienced investigator with a strong commitment to public service and delivering positive change. Skilled in leading complex Death and Serious Injury investigations, criminal enquiries, and misconduct cases within demanding regulatory environments. Brings excellent communication, stakeholder engagement, and customer‑focused skills, with a proven ability to manage competing priorities and meet tight deadlines. Analytical, composed, and confident in challenging decisions while maintaining professionalism. Combines strong evidence‑handling, problem‑solving, and strategic thinking with a warm, collaborative approach to building effective working relationships.

Proficient in producing detailed reports that support case progression and judicial processes. Strong communicator skilled in fostering professional relationships and facilitating collaboration among agencies to achieve thorough investigative outcomes.

Overview

24
24
years of professional experience
7
7
years of post-secondary education

Work history

Lead Investigator

Independent Office for Police Conduct (IOPC)
Sale, Greater Manchester
2013.08 - 2026.02

Lead Investigator - Key responsibilities:

  • Leading independent investigations into Death and Serious Injury (DSI) incidents during or after police contact.
  • Leading criminal investigations in accordance with Police and Criminal Evidence Act (PACE) 1984, Regulatory Investigator Powers Act 2000, and Criminal Procedure and Investigations Act 1996.
  • Leading misconduct investigations Police Misconduct Regulations 2012 and 2020 and Police Reform Act 2002.
  • Conducting investigations with set timelines, budgets, and quality standards.
  • Drafting and agreeing on Terms of Reference for assigned investigations.
  • Developing investigative strategies.
  • Identifying lines of enquiry.
  • Making investigative policy decisions.
  • Allocating actions t investigative team.
  • Undertaking investigative tasks, including interviewing, taking statements, preparing case files, and recommending criminal and/or disciplinary actions.
  • Managing disclosure in Death or Serious Injury (DSI) matters proceeding to misconduct and/or coronial proceedings and in criminal investigations.
  • Attending criminal, misconduct, and inquest proceedings, providing evidence as required.
  • Supervising scene management at incident locations to ensure evidence preservation and recovery.
  • Attending post-mortems and briefing pathologists as necessary. - Completing investigation reports for submission to IOPC decision maker upon investigation completion.
  • Communicating effectively with complainants, bereaved families, and other internal and external stakeholders.
  • Collaborating within multi-disciplinary teams, including decision makers, lawyers, and press officers.
  • Taking responsibility for personal development.
  • Assisting Directorate in achieving key deliverables and preparing disclosure schedules for court and inquest proceedings.
  • Reviewing sensitive material, liaising with traumatised bereaved families, and ensuring robust external scrutiny of actions and decisions.
  • Identifying potential improvements for police forces to enhance service delivery and prevent public harm.
  • Sale, Greater Manchester (Covering Northwest, Yorkshire, Humber and North East Police Forces)
  • Facilitated witness interviews to gather crucial information and insights.
  • Collaborated closely with legal teams to ensure successful prosecutions.
  • Maintained detailed records of ongoing cases, ensured transparency and accountability at all stages of investigation.
  • Led high-profile investigations for improved public safety.
  • Prepared thorough, accurate case files to support investigations and facilitate arrests.
  • Liaised with prosecution partners to manage processes around court proceedings.
  • Testified in courts to support case evidence and findings and secure convictions for suspects.
  • Obtained victim and witness statements, documenting evidence to support investigations.
  • Harnessed deductive reasoning and analysis to make informed decisions and conclusions.
  • Interviewed suspects and witnesses to gather evidence.
  • Attended court hearings to testify, provide evidence and support witnesses or victims.

Evidence Investigation Officer

West Yorkshire Police (WYP)
Bradford, West Yorkshire
2008.04 - 2013.08

Evidence Investigation Officer – Key responsibilities:

  • Delivered efficient investigative services, gathering and collating evidence for legal processes.
  • Managed 150-200 speed camera-related enquiries a week, ensuring compliance with legal standards for effective prosecutions.
  • Oversaw retrieval and analysis of speed camera footage, identifying key evidential material.
  • Conducted research on force computer systems to identify relevant data and complete risk assessments.
  • Executed interviews with offenders and witnesses, producing accurate statements for court proceedings.
  • Presented evidence in court regarding investigations and enquiries conducted.
  • Updated national databases with vehicular crime information and shared data to assist investigations.
  • Investigated offences of perverting the course of justice and reports of cloned vehicles.
  • Upheld ethical standards throughout all investigations, promoting trust and respect from colleagues and public alike.
  • Demonstrated exceptional communication skills during interviews and interrogations for optimum information extraction.
  • Participated in court proceedings when required, providing reliable testimony based on factual evidence collected during investigations.
  • Gathered evidence meticulously, contributing to successful prosecutions.
  • Developed strong working relationships within the criminal justice sector, enhancing collaboration efforts.
  • Managed caseloads efficiently, meeting all deadlines without compromising quality of work.
  • Compiled detailed investigation reports for case resolution.
  • Met needs of multiple investigations at differing paces, facilitating dynamic environment in line with legislation and investigation standards.
  • Obtained statements from victims and witnesses to support case progress and evidence collection.
  • Scoured through large amounts of data to locate relevant information and progress lines of enquiry.
  • Interviewed witnesses and suspects, removing bias from language to remain objective.
  • Brought designated cases to timely and successful conclusions.
  • Attended court hearings to testify, provide evidence and support witnesses or victims.
  • Interviewed suspects and witnesses to gather evidence.
  • Supported victims throughout investigations through listening to concerns and acting on requests.
  • Build and maintained strong relationships with partners and key stakeholders.

Operational Support Grade (OSG)

HM Prison Service (HMPS)
Leyland, Lancashire
2006.11 - 2008.04

Operational Support Grade (OSG) - Key responsibilities:

  • Ensured secure access for staff, visitors, and vehicles through gate duties.
  • Operated radio systems and monitored CCTV in control room, reporting suspicious activities.
  • Scheduled and processed visitor arrivals, escorting when necessary to maintain safety.
  • Detected and intercepted contraband while preserving evidence during inspections.
  • Secured cell doors and accounted for all prisoners during night shifts.
  • Supported reception tasks, including photographing prisoners and processing property documentation.
  • Supervised prisoners, facilitating exchanges of clothing and property as required.
  • Implemented Assessment Care in Custody and Teamwork Approach for at-risk prisoners.

Programme Support Worker

Lancashire Fire and Rescue Service (LFRS)
Blackburn
2006.01 - 2006.11

Programme Support Worker - Key responsibilities:

  • Marketed and promoted Lancashire Fire and Rescue Service Prince's Trust Team programme, supporting collaborative efforts.
  • Conducted Health and Safety risk assessments for individual team members.
  • Developed relationships with organisations referring young people to the programme and delivering specialist components.
  • Completed Team Leader training course successfully.
  • Acted as a role model and coach, motivating team engagement with the programme.
  • Assisted Team Leader in recruitment strategy, liaising with employment services, schools, and colleges.
  • Oversaw work placements for team members, ensuring compliance with Health and Safety procedures.
  • Resolved conflicts among team members effectively, maintaining a harmonious environment.
  • Used excellent communication and interpersonal skills to engage and interact with individuals in need.
  • Build and maintained strong relationships with partners and key stakeholders.

Next Steps Officer/Co-ordinator

Jobcentreplus & Lancashire Fire and Rescue Service
Preston, Lancashire
2004.04 - 2005.12

Next Steps Officer/Co-ordinator - Key responsibilities:

  • 2 year secondment from Jobcentreplus to Lancashire Fire and Rescue Service.
  • Established engagement with Connections, Police, Prison and Probation Service, Youth Offending Team, and Youth and Community Services across Lancashire.
  • Cultivated strong relationships with Market Managers at job center's and local employment agencies.
  • Collaborated with careers service to enhance support for job seekers.
  • Oversaw development of Programme Support Workers' roles to improve service delivery.
  • Led Next Steps Weeks, delivering sessions on mock applications, interview techniques, and real interviews for work placements.
  • Facilitated smooth communications between departments for better coordination.
  • Implemented guaranteed interview schemes with local employers to increase job opportunities.
  • Managed NHS job apprenticeship scheme to facilitate career pathways for young individuals.
  • Maintained contact with unemployed young people to secure employment or further training opportunities.
  • Liaised closely with external agencies such as social services and housing departments, providing comprehensive support for individuals in need.
  • Maintained impeccable uniform and equipment, representing department professionally in all interactions.
  • Liaised with community members to perform outreach and educate on crime prevention.
  • Maintained strict confidentiality through careful and correct storage of case documents, in line with internal policies.
  • Build and maintained strong relationships with partners and key stakeholders.

Statistics Co-ordinator

JobcentrePlus
Preston, Lancashire
2001.12 - 2005.12

Statistics Co-ordinator - Key responsibilities:

  • Produced a district digest for District Manager and Senior Management Team.
  • Reviewed performance metrics of local Jobcentre offices across the district.
  • Liaised with Business Managers to align strategies and operations.
  • Presented analytical data to Senior Management Team during monthly board meetings.
  • Facilitated cross-departmental meetings for improved collaboration efforts.
  • Collaborated across departments for strategic planning purposes.
  • Managed and prioritised varied and busy workload to meet deadlines.
  • Managed databases and information systems, maintaining accurate and accessible records.
  • Build and maintained strong relationships with partners and key stakeholders.

Education

Diploma - Police and Prison Service Entrance Exam

International Correspondence Schools
1995.07 - 1997.07

GCSEs - GCSEs

All Hallows RC High School
Preston
1989.08 - 1994.08

NOCN Level One - Trade Union

The Manchester College
Manchester
2016.04 - 2016.04

Skills

  • A well‑developed set of investigative skills is applied to each case, combining analytical thinking, critical evaluation, and evidence‑based decision‑making to manage complex and high‑priority investigations Evidence is gathered, recorded, and analysed with meticulous attention to detail, ensuring full compliance with chain‑of‑custody standards and organisational protocols
  • The investigative approach includes structured evidence reviews, accurate statement‑taking, and the production of clear, comprehensive reports that support case progression and judicial processes Objectivity is maintained throughout, using evidence‑based reasoning to identify key lines of enquiry and ensure investigative actions are ethical, proportionate, and legally sound
  • Evidence‑based decisions are made in fast‑moving investigative environments, supported by analytical thinking, critical evaluation, and a clear understanding of legal and procedural frameworks Calm, objective, and focused working practices enable the delivery of high‑quality work in challenging and time‑sensitive situations
  • High standards of integrity, ethical conduct, and accountability are upheld in all investigative activity Victims, witnesses, complainants, and partner agencies are treated with respect and fairness, ensuring actions reflect organisational values and legal responsibilities Work remains thorough, accurate, and aligned with professional expectations, contributing to public trust and confidence in the investigative process
  • Communication is clear, professional, and purposeful across a wide range of audiences, including victims, witnesses, partner agencies, and legal professionals Interviewing skills are grounded in ethical practice, active listening, and effective questioning, enabling the collection of reliable information Detailed, accurate reports and statements are produced to support case progression and judicial processes, with communication styles adapted to situational needs
  • Strong professional relationships are built through clear communication, active listening, and a shared understanding of each agency’s role, responsibilities, and priorities Experience in victim support, court‑hearing preparation, and multi‑agency collaboration strengthens the ability to deliver thorough, fair, and accountable investigative outcomes
  • Honesty, transparency, and fairness guide all investigative work Confidentiality is maintained, sensitive information is safeguarded, and investigative actions comply with legal and ethical standards Approaches to evidence handling, interviewing, and decision‑making demonstrate a commitment to impartiality and accountability, supporting public confidence in the investigative process
  • Honesty, transparency, and fairness guide all investigative work Confidentiality is maintained, sensitive information is safeguarded, and investigative actions comply with legal and ethical standards Approaches to evidence handling, interviewing, and decision‑making demonstrate a commitment to impartiality and accountability, supporting public confidence in the investigative process

References

References available upon request

Accomplishments

  • I received recognition from a Detective Inspector regarding a handover package which, was described as "one of the most professional handover packages I have had the the pleasure to receive".
  • My secondment to Lancashire Fire and Rescue Service from Jobcentreplus received recognition from Charter Mark, which was a government award recognising excellence. It stated "contributing to improving opportunities and quality of live you serve" my work had made "some contribution to enriching the social and economic life or physical life through positive or discretionary initiatives and imaginative use of resources".
  • I have received two awards from Peter Holland, former Chief Fire Officer of Lancashire Fire and Rescue Service recognising the contribution I had made in helping young people throughout Lancashire.
  • In 2004, I received recognition from the Mayor of South Ribble who stated "it was a pleasure to meet someone so committed to the local community and anxious to help others. Your attitude and concern are an example to many of your peers".

Courses

  • May 2003 - August 2003 Lancashire Fire and Rescue Service - The Prince’s Trust Team Programme (Personal Development Programme) including; Working with Others Communication Caring for Others Problem Solving Taking Responsibility
  • May 2003 - August 2003 Challenging Team Course - The Prince’s Trust The course enable change and development, developing empathy, managing conflict and developing self awareness.
  • March 2006 - March 2006 The Prince’s Trust Team Programme Initial Training Course The course covered then role of the team leader, motivation and team programme, learning journey, accrediting learning, reviewing learning, leadership, group dynamics, communication skills and planning.
  • March 2006 - March 2006 Case builder Course = West Yorkshire Police Case builder and file preparation course.
  • January 2001 - December 2001 Counselling Skills Level One.

Timeline

NOCN Level One - Trade Union

The Manchester College
2016.04 - 2016.04

Lead Investigator

Independent Office for Police Conduct (IOPC)
2013.08 - 2026.02

Evidence Investigation Officer

West Yorkshire Police (WYP)
2008.04 - 2013.08

Operational Support Grade (OSG)

HM Prison Service (HMPS)
2006.11 - 2008.04

Programme Support Worker

Lancashire Fire and Rescue Service (LFRS)
2006.01 - 2006.11

Next Steps Officer/Co-ordinator

Jobcentreplus & Lancashire Fire and Rescue Service
2004.04 - 2005.12

Statistics Co-ordinator

JobcentrePlus
2001.12 - 2005.12

Diploma - Police and Prison Service Entrance Exam

International Correspondence Schools
1995.07 - 1997.07

GCSEs - GCSEs

All Hallows RC High School
1989.08 - 1994.08
Jason MayrenLead Investigator