LANHAM, Md. (CBSDC/AP) – A D.C. police officer accused of killing his mistress and leaving their child to die in a hot car in 2011 has been found guilty.

A jury found Richmond Phillips guilty on two counts of first-degree murder for the deaths of Wynetta Wright and her 1-year-old child just hours after being handed the case Thursday afternoon in Prince George’s County Circuit Court.

Prosecutors claimed during the trial, which began Monday, that a married Phillips, 40, shot and killed Wright, 20, outside a Hillcrest Heights community center in May 2011 because he didn’t want to pay child support for the couple’s 1-year-old daughter, Jaylin Wright.

After killing Wright, prosecutors said Phillips drove her car to a nearby apartment complex and left Jaylin in the vehicle to die. Police say the girl may have died as a result of exposure to the heat.

The killings took place hours before Phillips was supposed to submit a DNA sample that would prove he was the father of Jaylin, prosecutors said.

Prosecutors say Phillips faces life without the possibility of parole plus 20 years at sentencing March 22.

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