A former Redmond man is involved in a murder suicide in Washington State. Police say David Stewart, 38, who was a combat medic, shot and killed his wife and himself in a police chase Tuesday. Deputies found the couples’ 5 year old son Jordan, dead of suffocation in their home. Pierce County Detective Ed Troyer says at this point they aren't sure who killed the little boy: “We're going to have to rely on the evidence and some science and some forensics tests to hopefully tell us more of what happened there, because anybody who was around is deceased. We may not have all the answers; we may never will. We do know that we have a male who we believe shot the female and then shot himself. Both of them were at the residence before that time and they both knew there was a dead child at the house. What caused that to happen is what we're waiting for the science to help us answer, if it'll even be able to." Stewart has twice deployed to Iraq. He was based at Fort Bragg, North Carolina and then transferred to Joint Base Lewis McChord, south of Seattle in 2010. Deputies say Stewart shot and killed himself following a high-speed car chase on Interstate 5 near Olympia. His wife Kristy was found shot to death in the car.