A man allegedly indecently assaulted a girl selling cookies to benefit the Humane Society at an MBTA station

Mark Hurd, 56, was arrested after an investigation.

Mark Hurd. —MBTA Transit Police

A Dorchester man was arrested Wednesday after police say he indecently assaulted a 13-year-old girl selling cookies to benefit the Humane Society at the Ashmont MBTA station earlier this month.

Mark Hurd, 56, will face a related charge or charges for the incident that happened around 7 p.m. on Nov. 13, transit police said.

The teen girl had the proper permits to sell cookies and had an adult supervising her. However, when the adult went to move a table nearby, Hurd approached the girl and began asking her about the cookies, according to police. He then allegedly assaulted her.

Police conducted an investigation that led them to Hurd, they said.