Washington D.C. police officer Richmond Phillips is accused of shooting his mistress Wynetta Wright to death and leaving their infant child to die in a hot car in Upper Marlboro, Maryland.
Phillips was arrested in June 2011 after Wright's body was found in a park where the two had met. Their child, Jaylin, almost one, was found dead in her car seat with the doors closed and windows rolled up, reports the Associated Press.
Prince George's County, Md., State's Attorney Angela Alsobrooks said during Phillips's trial on Monday that Phillips killed the woman and the baby because he didn't want to pay child support.
Alsobrooks claimed that Phillips knew what he was doing, especially after all the stories in the news in recent years about the dangers of leaving children in cars during hot weather.
Phillips is being tried on two counts of first-degree murder, as well as child abuse and firearms charges.
Defense lawyer Brian Denton told the jury that Phillips is innocent and that the evidence is circumstantial.