http://www.mercurynews.com/breaking-news/ci_16934218?nclick_check=1

WALNUT CREEK -- Police Tasered a man who allegedly punched his ex-wife in the face during a child custody exchange and then fought officers who tried to arrest him.

Don West, 50, of Walnut Creek, was booked at the County Jail in Martinez on suspicion of domestic violence and making criminal threats after being evaluated at a hospital.

The assault took place at 5:50 p.m. in a municipal parking lot near a pub in the 1500 block of North Broadway, police Sgt. Lanny Edwards said.

Several people called 911 after seeing West argue with the victim over the custody exchange of two children, before knocking her unconscious with a punch.

West ran away, but returned later, police said. When officers tried to arrest him, he fought back and resisted arrest.

The victim was taken to a hospital with minor injuries.

Roman Gokhman covers public safety. Contact him at 925-945-4780. Follow him at Twitter.com/RomiTheWriter.