Officer record · As reported by the employing agency

Mark Kieffer III

Trenton Police Department · 2 records · 2023, 2024

About this data

Records on this page come from the Attorney General's major discipline releases: final, post-appeal discipline as reported by the employing agency. They are sustained charges, not allegations.
All figures are self-reported by agencies to the New Jersey Attorney General and shown as reported. Blank fields read "not reported," never "no."
Data is a yearly snapshot. Cases are not tracked across years, and major discipline appears only in the year it became final after all appeals.
In internal affairs data, allegations are not findings: many complaints end unfounded, exonerated, or not sustained.
Any compensation figure below comes from New Jersey Treasury pension data, a separate source from the discipline records. It is matched to this officer by name and employing agency at high confidence, not by certified identity.

Full caveats and definitions: methodology. To request a correction against the official record: corrections.

Major discipline · 2024^[1]

Suspended 120 days

Rank as reported: Police Officer
Sustained charge(s): of a Public Employee
Other sanction: Loss of time
Separated while IA pending: No

Plain-language summary (this site, from the cited record only)

Officer Mark Kieffer III received a 120-day suspension from the Trenton Police Department in 2024, along with a loss of time. Kieffer made and circulated via text to other employees of the police department an inappropriate meme naming officers and supervisors regarding an active Internal Affairs investigation. The meme disclosed to the department the officers involved and the nature of the complaint of a confidential Internal Affairs investigation. The sustained charge was Conduct Unbecoming of a Public Employee.

Synopsis as reported by the agency

Officer Mark Kieffer III made and circulated via text to other employees of the police department an inappropiate meme naming officers and supervisors regarding an active Internal Affairs investigation. The meme disclosed to the department the officers involved and nature of the complaint of a confidential Internal Affairs investigation.

Major discipline · 2023^[2]

Suspended 60 days

Rank as reported: Detective
Sustained charge(s): a public employee
Separated while IA pending: not reported

Plain-language summary (this site, from the cited record only)

Detective Mark Kieffer III received a 60-day suspension from the Trenton Police Department in 2023. During calendar year 2021 and 2022, Kieffer cancelled time from the Police Officer Scheduling System, resulting in misuse of accrued time. The sustained charge was Conduct Unbecoming a public employee.

Synopsis as reported by the agency

During calendar year 2021 and 2022 Detective Mark Kieffer cancelled time from the Police Officer Scheduling System resulting in misuse of accrued time.

Compensation and pension

Active member · NJ Treasury YourMoney^[3]

This site: records-based match

Base salary (pension basis): $95,110
Pension fund: Police and Firemen's Retirement System (PFRS)
Reported years of service: 9 years, 4 months

How to read this

The amount is as reported by the New Jersey Department of the Treasury in its YourMoney pension data, as of March 31, 2026. It is the pension-basis figure and may not include overtime, accrued leave, stipends, or other pay. The link between this officer and this pension record is a records-based match at high confidence (exact name and exact employing agency), not a certified identity. If it is wrong, we will remove it: corrections.

Sources

[1]New Jersey Major Discipline Data, 2020-2025. New Jersey Office of the Attorney General. Sheet "Major Discipline Data", row 1155. Snapshot retrieved 2026-07-03. ↩
[2]New Jersey Major Discipline Data, 2020-2025. New Jersey Office of the Attorney General. Sheet "Major Discipline Data", row 1770. Snapshot retrieved 2026-07-03. ↩
[3]YourMoney Active Pension Members (PFRS/SPRS subset). New Jersey Department of the Treasury. Row 229549, snapshot as of March 31, 2026. Derived from the public YourMoney Active Pension Members dataset, https://www.yourmoney.nj.gov/. ↩