An 18-year-old Marblehead man has been charged with raping three 13- and 14-year-old girls. Matthew Labrie was ordered held on $50,000 bail after not-guilty pleas were entered on his behalf Monday to charges of statutory rape of a child, indecent assault and battery on a child under 14, and witness intimidation. Prosecutors said police met the Marblehead Veterans Middle School principal early in January after the principal reported learning a student was sexually involved with an 18-year-old man. Labrie’s lawyer requested $5,000 bail because his client had no record and cooperated with the investigation. The Daily Item reported that the defense lawyer said his client had been bullied in school and befriended people younger than him.