Transcript for 13-year-old arrested in murder of Barnard College freshman
major headlines this Friday night, and to a break in the case of the horrific murder in New York City. An 18-year-old college student murdered while walking in a city park. Tonight, a 13-year-old is now under arrest. Police say he was seen in grainy surveillance near the scene. Here's erielle reshef. Reporter: Tonight, a 13-year-old suspect arrested in the chilling murder of Barnard college freshman Tessa majors. It is an absolute tragedy. Those responsible, however many there may be, will be brought to justice. Reporter: Police say the teen is not the killer, but was found with the murder web, a knife. Now charged with murder, robbery, and weapons possession. His statements to detectives also implicating two additional suspects. One of them, a 14-year-old, interviewed by police. The other still at large. There's going to be an aided female, white, stabbed at this time. Reporter: Majors walking through the park just a block from her school early Wednesday evening when authorities say a group of suspects demanded money before fatally stabbing the 18-year-old student multiple times. What's descrip on the perp? Unknown descrip. Reporter: Police now say the 13-year-old suspect in custody was seen on grainy surveillance video from the park. The campus community grappling with the devastating loss. Majors just weeks shy of finishing her first semester. A budding musician and journalist. Her heartbroken family telling ABC news, "We are devastated by the senseless loss of our beautiful and talented Tess. We are thankful for the incredible outpouring of love and support we have received from across the country." And the teen suspect is now being charged as a juvenile. That means this case is being taken up in family court. Police tell us his aunt maintains his innocence.
This transcript has been automatically generated and may not be 100% accurate.