A Methuen man accused of threatening a witness in a murder trial has been arrested and ordered to stay away from Salem Superior Court until that trial’s conclusion. Authorities say Cesar Jimenez, 33, was overheard by police officers muttering the Spanish word for “snitch” or “whistleblower” near the witness, who was not named. The son of Jimenez’s girlfriend, 24-year-old Daniel Lee Lopez, is one of two men on trial for the murder of a Chinese food deliveryman in 2009. Lopez and 20-year-old Ronny Ramos allegedly lured the man with a fake order, then assaulted him and robbed him as he lay dying, according to reports. Charged with witness intimidation, Jimenez was held on $10,000 bail.