Detective John James Mulligan

Detective John James Mulligan

Boston Police Department, Massachusetts

End of Watch Sunday, September 26, 1993

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John James Mulligan

Detective John Mulligan was shot and killed while working a secondary employment detail. He was shot five times in the face, execution style, as he sat in his car at a store at 972 American Legion Highway.

Two suspects were tried and convicted of first-degree murder in 1995, but one suspect had his conviction overturned in 2000 when he plea bargained for manslaughter. In February 2006, the suspect admitted his participation in the execution-style killing of Detective Mulligan.

Prosecutors declined to try the second suspect a fourth time after three previous convictions were overturned.

Detective Mulligan had served with the Boston Police Department for 27 years. He is survived by his two sons.


  • Age 52
  • Tour 27 years
  • Badge Not available

Incident Details

  • Cause Gunfire
  • Weapon Handgun; .25 caliber
  • Offender Convicted

secondary employment

Most Recent Reflection

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I can appreciate that Det. Mulligan's family experienced a loss and for that I truly feel sorry for them.

However, to hold this officer up as an honorable person is pathetic and doesn't say a lot for what we expect from the BPD.

The fact that he was corrupt and dirty was an open secret locally and to pretend otherwise is dishonest and needs to be directly addressed as such.

Boston Resident
E-5 resident

December 11, 2020

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