(Hillsboro, OR) -- Washington County Sheriff's deputies rescued a pregnant woman from a sinking truck after her boyfriend allegedly abandoned her. Deputies were pursuing the truck after learning it was stolen when the driver went through a field and crashed into the Tualatin River. The driver then swam to shore and ran. The suspect's girlfriend didn't know how to swim. A deputy jumped into the river and rescued her. She was evaluated at a hospital and wasn't injured. Police are trying to find the driver, Jonathon Laura.