A Chicago woman recently turned in her own son for the robbery and sexual assault of another woman on the city’s subway line after picking him out of a surveillance video.

According to the New York Daily News, Chicago prosecutors said Deshawn Isabelle, 15, was arrested for sexually assaulting, physically beating, and robbing a 41-year-old woman on April 20.

Police said Isabelle approached the woman from behind on the Chicago Transit Authority’s Blue Line train, beat her, took $2,000 in cash and her iPhone, and sexually assaulted her before he fled the scene. The woman was carrying the cash to wire to a relative in Thailand, according to Chicago ABC affiliate WLS.

“He pulled her to the ground by her hair, groped her and sexually assaulted her,” Assistant State’s Attorney Joe DiBella said, according to The Chicago Tribune. “He then continued to beat her while sitting on her head and held her down so she could not get off at the next stop.”

After Isabelle’s mother identified him in the video, she made him go to the police and turn himself in, WLS reported. Isabelle confessed that he had committed the crime and allegedly spent the money on Jordan jumpsuits and candy.

Isabelle was charged as an adult with aggravated criminal sexual assault and robbery and is being held on $1 million bond.