A 15-year-old boy has been charged with carjacking an 84-year-old woman earlier this month in north suburban Evanston.

The woman was driving her gray 2011 Lexus north just after 2 p.m. Feb. 1 on Sheridan Road near Davis Street when it was rear-ended by a black Acura, according to a statement from Evanston police.

When the woman got out of the Lexus, a male from the Acura jumped into it and drove off north on Sheridan, with the Acura following, police said. The suspects also got away with her purse containing credit cards, house keys and $200 in cash. The woman was not injured.

The Lexus was found parked in an alley behind the boy’s home in the Englewood neighborhood on Feb. 4, police said.

The boy was positively identified by the woman as the suspect who drove the Acura and spoke to her while another suspect drove off in her car, police said. He has a “lengthy criminal record.”

The boy was already being held at the Cook County Juvenile Temporary Detention Center at 1100 S. Hamilton Ave. on unrelated carjacking and weapons charges when Evanston police took him into custody, police said.

He was taken to the Evanston Police Department Tuesday and charged with a felony count of aggravated vehicular hijacking for the Feb. 1 incident, police said. He was then brought back to the juvenile detention center, where he remained in custody Wednesday.

The second suspect remained at large, police said.