Maryland State Police say Troopers were called to a crash involving a Nissan Altima and a tractor trailer on the Inner Loop near Exit 13 (Ritchie Marlboro Rd.) shortly after 10:00 Sunday night. According to Mark Brady, spokesman for Prince George's County Fire and Rescue, crews responded to the scene where they found an infant passenger of the Nissan suffering from life-threatening injuries and two adults still trapped inside the vehicle. Both adults were extricated and transported with non-life-threatening injuries. The child was taken to Children's Hospital in critical condition. The driver of the tractor trailer was not injured.