A Livermore police officer tried to help a motorcycle crash victim just after midnight Wednesday, but it was too late.
Daniel Vanderhoofven, 30, of Livermore died at the scene, according to police; the officer couldn't revive him from his life-threatening injuries.
Police said the preliminary investigation shows that Vanderhoffven failed to negotiate a curve in the road, which caused his motorcycle to jump the curve and hit a sound wall.
The Livermore Police Department Traffic Unit would like to talk to anyone who witnessed the crash. You can call Officer Dave Boyes at (925) 371-4896.
Livermore police said in 2011 there were two fatal collisions involving motorcycles and in both cases excessive speed was a factor.