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MEMPHIS, Tenn. — Tremaine Wilbourn, who is accused of shooting and killing Memphis Police Officer Sean Bolton, was indicted on federal charges of armed carjacking and felony possession of ammunition, the Department of Justice announced Tuesday.

Bolton pulled over a car Wilbourn, 30, was a passenger in Aug. 1. Bolton tried to detain Wilbourn, but Wilbourn pulled out a gun and shot Bolton multiple times, according to multiple reports.

Later that night, Wilbourn allegedly carjacked a man and his 2002 Honda Accord at gunpoint.

The carjacking charge could put Wilbourn in prison for 15 years, but if he is convicted of using a firearm during that carjacking, he could face life in prison. Felony possession of ammunition carries a possible sentence of 10 years.

Wilbourn also faces a fine of up to $250,000 for each count.