More than a week after a serious three-car accident on Route 114 in East Hampton, police are still looking for witnesses to help them figure out what happened. The drivers of a Subaru Forester and a Chevrolet utility truck that collided head-on just north of Stephen Hand’s Path on April 16 were both airlifted to Stony Brook University Hospital, but their injuries were not believed to be life threatening, according to East Hampton Town police.