Raymond McAllister, 20, of Woburn was being held in lieu of $10,000 bail. The charges against him include dissemination of matter harmful to a minor, child enticement, and posing or exhibiting a child in a state of nudity, The Boston Globe reported.
McAllister was arrested Tuesday after officials in Arizona's Pima County Sheriff's Department told Massachusetts authorities of a report of an unidentified man video chatting with the 13-year-old boy, who lives in Arizona. Police traced the man's account to McAllister.
"These troubling charges are further compounded by the fact that this defendant works with youth in a number of areas in the Greater Woburn area," Middlesex District Attorney Gerry Leone said in a statement.
In addition to coaching 12- to 14-year-olds in Little League, McAllister also volunteered at a children's Bible camp and was a Jujitsu instructor for children, the Globe said.