DETROIT -

A man whose arrest led to the shooting death of a 7-year-old girl by Detroit police has pleaded guilty in the slaying of a teenager following a dispute outside a party store.

The Wayne County prosecutor's office said Chauncey Owens said received a sentence agreement of 28 years in prison following his plea Monday to second-degree murder in the slaying of 17-year-old Je'rean Blake. Owens is to be sentenced May 23.

He also pleaded guilty to felon in possession of a firearm.

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Prosecutors said Owens is to testify in future proceedings about who gave him the weapon used to kill Blake last May.

Blake?s mother, Lyvonne Cargil, said she is still healing from losing her son but is thankful to get some closure.

?At least he admitted that he killed my son, that somebody gave him a gun. It?s not going to bring my son back,? she said.

Detroit police were being followed by the A&E Network's "First 48" crime reality cable TV show when they raided the house Owens was living in.

Aiyana Jones was on a sofa in the first-floor of the two-family flat when Detroit police tossed a flash-bang grenade through a window and burst through the front door.

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Detroit police said an officer's gun accidentally discharged after he was bumped or jostled by the girl's grandmother.

The Wayne County prosecutor's office is deciding whether to file charges in the girl's death after getting a report from police last month.