RICHMOND, Va. (AP) — A man sentenced in three slayings has pleaded guilty in a fourth killing that unfolded in a motel parking lot in Virginia.

The Richmond Times-Dispatch reports 36-year-old Winston Bernard Black Jr. admitted to first-degree murder in the death of 20-year-old Walter Darnell Adams Jr.

Prosecutors say Black tried to buy marijuana from Adams using a fake $100 bill while in the motel parking lot in 2016. When Adams gave back the fake cash, Black shot Adams. Police found Adams dead in the parking lot in Henrico County with gunshot wounds to his chest and arm.

Black was sentenced to 25 years for Adam's killing. He'll serve that time concurrently with a 70-year sentence that he is already serving for three other slayings that happened in Portsmouth in 2011 and 2012.

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Information from: Richmond Times-Dispatch, http://www.richmond.com