| Abbreviation | Definition |
|---|---|
| MCSO | Monterey County Sheriff's Office |
| MCSO | Multnomah County Sheriff’s Office |
| MCSO | Multnomah County Sheriffs Office |
| MCTC | Maryland Correctional Training Center |
| MDC | Men's Detention Center |
| MDC | Mobile Data Computer |
| MDFE | Mobile Device Forensic Examiner |
| MDK | Mad Dog Killer |
| MDK | Murder, Death, and Kill |
| MDPD | Miami-Dade Police Department |
| MDPGA | Ministry of Defence Police and Guarding Agency |
| MDPGA | Ministry of Defence Police Guarding Agency |
| MEPD | Mos Eisley Police Department |
| METS | Mobile Entry Training Simulator |
| MFH | Missing From Home |
| MFPD | Marble Falls Police Department |
| MFPD | Martins Ferry Police Department |
| MFPD | Masonic Fraternal Police Department |
| MFPD | Menomonee Falls Police Department |
| MFPF | Multi Function Police Facility |