LOCKEFORD — San Joaquin County Sheriff’s Office detectives are looking for a man who tried to rob a Lockeford bank Saturday claiming to be under the instructions of someone else.The man entered the Wells Fargo located at 19000 N. Highway 88 at 9 a.m. and handed the teller a note, the Sheriff’s Office said.The note read “$10,000 they have a bomb on my chest.