Merrimack man accused of sexually assaulting fellow teen

MERRIMACK – A 19-year-old Merrimack man was arrested Saturday and charged with sexually assaulting a 17-year-old girl last month.

Police arrested Tyler Garstang, of 17 Mitchell St., and charged him with two counts of aggravated felonious sexual assault and one count of sexual assault, after a weeklong investigation, police said.

Police were contacted shortly before 4 a.m. May 28, when a 17-year-old girl told them she had been sexually assaulted by a male acquaintance around 2 a.m. inside a home on Coles Rock Road during what police called an underage drinking party, police said.

Detectives searched the home for evidence, interviewed several witnesses there and later interviewed Garstang, police said.

They arrested Garstang at his home on Saturday and held him on $10,000 cash bail. He was arraigned Monday, and bail was set at $7,500 cash or surety, police said.

The aggravated felonious sexual assault charges are Class A felonies. The sexual assault charge is a Class B misdemeanor, police said.

Garstang is scheduled to return to Merrimack District Court on June 14 for a probable cause hearing, police said.