WASHINGTON — Thirty years after a DC Police officer was shot and killed inside her Silver Spring apartment, the Montgomery County Department of Police announced Tuesday that they arrested a suspect as part of the 1995 cold case investigation.

A Metropolitan Police Department officer with an already established record in the department's Seventh District, 24-year-old Denna Fredericka Campbell was a four-year veteran of the force. Campbell had made a name for herself as an officer, patrolling the Southeast D.C. neighborhoods where she had been raised.

The Montgomery County Police Department had charged Campbell's boyfriend, Amir Jalil Ali, with the shooting on Sept. 16, 1995. Ali claimed he had found Campbell's body when he returned home to the apartment they shared, on the 1500 block of H

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