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Miss. investigators: Murder suspect shot officer, then himself, at Jackson police headquarters

  • Law enforcement officers wait at the entrance to the Jackson Police Department Thursday, April, 4, 2013, after police say a murder suspect fatally shot detective Eric Smith inside the headquarters. The suspect is also dead. (AP Photo/The Clarion-Ledger, Greg Jenson)

    Law enforcement officers wait at the entrance to the Jackson Police Department Thursday, April, 4, 2013, after police say a murder suspect fatally shot detective Eric Smith inside the headquarters. The suspect is also dead. (AP Photo/The Clarion-Ledger, Greg Jenson)  (The Associated Press)

  • Jackson, Miss. Assistant Chief Lee Vance, center left, comforts Chief Rebecca Coleman, center right, Thursday, April, 4, 2013, after detective Eric Smith was shot and killed inside the Jackson Police Department. A suspect was also killed. (AP Photo/The Clarion-Ledger, Greg Jenson)

    Jackson, Miss. Assistant Chief Lee Vance, center left, comforts Chief Rebecca Coleman, center right, Thursday, April, 4, 2013, after detective Eric Smith was shot and killed inside the Jackson Police Department. A suspect was also killed. (AP Photo/The Clarion-Ledger, Greg Jenson)  (The Associated Press)

  • In this 2008 image provided by the Jackson, Miss. Police, Detective Eric Smith, center, flanked by Chief Rebecca Coleman, left, and Assistant Chief Lee Vance accepts the Certificate of Commendation on behalf of Detective Amos Clinton in Jackson, Miss. Authorities say a murder suspect shot Smith inside the Jackson police headquarters and that both the suspect and detective are dead. (AP Photo/Jackson Police)

    In this 2008 image provided by the Jackson, Miss. Police, Detective Eric Smith, center, flanked by Chief Rebecca Coleman, left, and Assistant Chief Lee Vance accepts the Certificate of Commendation on behalf of Detective Amos Clinton in Jackson, Miss. Authorities say a murder suspect shot Smith inside the Jackson police headquarters and that both the suspect and detective are dead. (AP Photo/Jackson Police)  (The Associated Press)

State police in Mississippi say a murder suspect shot a Jackson police detective and then shot himself at police headquarters.

Mississippi Bureau of Investigation spokesman Warren Strain said Friday that Jeremy Powell shot Detective Eric Smith before killing himself, in the first official description of how the men died.

The state agency took over the investigation from the Jackson Police Department.

The men died in a third-floor room Thursday where Smith was interrogating Powell. Powell had been arrested in connection with the stabbing death of a 20-year-old Jackson man.

Hinds County Coroner Sharon Grisham-Stewart says she will perform autopsies on Friday.