Demian Bulwa / San Francisco Chronicle
Gary Hesterberg was zapped with a park ranger’s Taser on Jan. 29, 2012, while walking his dogs along a trail at Rancho Corral de Tierra near Montara in the Golden Gate National Recreation Area. … Rep. Jackie Speier ripped the National Park Service on Tuesday over its investigation into a ranger’s use of a Taser to subdue a San Mateo County man who was allegedly uncooperative after being stopped with off-leash dogs. … Michael Haddad, Hesterberg’s attorney, said his client had been handcuffed and held for several hours. Haddad filed a claim last month seeking $500,000 from the park service, a precursor to a civil rights lawsuit. “It looks like this is the only way to get a real strong investigation into the ranger’s actions,” Haddad said.