The owner of a Santa Cruz surfing school was arrested late Friday night on suspicion of “lewd and lascivious acts” with children after investigators discovered inappropriate videos and photos of young girls at his home and business, according to Santa Cruz police. Dylan Greiner, 38, owner and operator of Santa Cruz Surf School, was arrested after detectives served search warrants at his Westside home and downtown business, Santa Cruz Deputy Police Chief Steve Clark said. Greiner was booked into Santa Cruz County Jail on two felony charges of lewd and lascivious acts with children, and he remained there Saturday on $500,000 bail. Clark said Judge John Gallagher agreed to increase the bail at the request of police. Additional charges are expected. Greiner, whose videos of discarded drug needs at Cowell Beach galvanized cleanup efforts in 2012, is accused of befriending two teenage students from his surf school and making inappropriate sexual advances toward them. He allegedly took videos and photos of them focusing on private body parts. Clark said the two victims were 14 and 13 when the relationships began.