Sean Suiter, a 43-year-old Baltimore homicide detective, was fatally shot in the head on November 15 with his own service weapon while on duty.

A Baltimore police officer who was killed with his own service weapon was preparing to testify against fellow officers indicted in a drug-running scheme.

Sean Suiter, 43, was fatally shot in the head on November 15, and authorities say there is evidence of a struggle, according to the Baltimore Sun.

At the time of his murder, the homicide detective was scheduled to testify before a federal grand jury about a case that alleged police in his city had conspired with cops in Philadelphia to sell cocaine and heroin.

The drugs they were going to sell were allegedly seized from the streets of Baltimore, Philly.com reported.

Baltimore Police Commissioner Kevin Davis has claimed that there is no link between Suiter's death and the drug-running indictment.

'The BPD and the FBI do not possess any information that this incident is part of any conspiracy,' Davis told the Baltimore Sun.

Suiter worked for the Baltimore force for 18 years; he leaves behind a wife and two children.

Suiter was scheduled to testify before a federal grand jury about a case that alleged police in his city had conspired with cops in Philadelphia to sell cocaine and heroin. Baltimore Police Commissioner Kevin Davis, pictured, says they aren't related

Suiter worked for the Baltimore force for 18 years; he leaves behind a wife and two children

He was shot around 4pm on November 15, after approaching a suspicious pan in the Harlem Park neighborhood.

Suiter died the next morning from his wounds after doctors worked for hours in an attempt to save him.

Davis said just after his death that Suiter was 'juts doing his job on behalf of the city' when he was shot.

He said authorities are offering a $215,000 award and imploring anyone with information that could lead to an arrest in Suitor's murder to come forward.

The neighborhood where the officer was shot has a number of vacant row houses and has been the scene of numerous shootings over the years. Pictured is an abandoned building at the scene of detective Suiter's muder

The neighborhood where the officer was shot has a number of vacant row houses and has been the scene of numerous shootings over the years.

Wednesday's shooting of the police officer comes amid a particularly violent period in Baltimore.

So far this year, the city of less than 620,000 inhabitants has seen over 300 homicides.