Michael Chalk, a 61-year-old former leader a Central Falls Boy Scout troop, was arraigned on first-degree sexual assault charges for allegedly abusing a boy between 1982 and 1984, the Rhode Island Attorney General's Office said Friday.

The office of Rhode Island Attorney General Peter Neronha said Friday that 61-year-old Michael Chalk of Pawtucket had been charged with two counts of first-degree sexual assault.

Between 1982 and 1984, when Chalk was a leader of a troop in Central Falls, he allegedly assaulted a male victim who was 13 or younger. The victim was a member of the troop.

Authorities say the abuse occurred at St. Matthew's Church, where the troop held its meetings.

Chalk was previously convicted in 1999 of first-degree child molestation and sexual assault against three minors, also members of the Boy Scouts. He was sentenced to 20 years in prison.

- In 1999, Chalk, then 37, was convicted of sexual assault and molestation of three Boy Scouts. One of the assaults occurred when he molested a 14-year-old boy inside a tent with seven other Scouts at Camp Yawgood in Hopkinton, a 1,800-acre recreation area that attracts several hundred scouts from Rhode Island, Massachusetts, New York, New Jersey, Vermont, and other states each year. He was sentenced to serve 20 years at the Adult Correctional Institution, followed by a 20-year suspended sentence.

- A 25-year member of the Boy Scouts of America and leader of an East Providence troop for five years, Chalk was sentenced in 2001 for second-degree sexual assault on a 16-year-old boy during a sleepover at a friend’s house in 1984 in Pawtucket.

- Chalk also worked as a youth-care counselor for children at Harmony Hill House, which was a residential group home for troubled boys in Gloucester, R.I. He was convicted of assaulting a 15-year-old resident.

- Of the charges Chalk was convicted of in 1999, he testified that none had occurred, according to a Providence Journal report at the time. He had testified that the 14-year-old Boy Scout was upset because Chalk had disciplined him at camp earlier on the day of the assault and that the 15-year-old group home victim was trying to get back at him. He also testified that the 16-year-old boy was upset because Chalk told his parents he smoked marijuana.