Investigators are trying to figure out what sparked a shooting in New Rochelle that's left one teen dead and another under arrest.

A makeshift memorial now stands at the corner of Fourth street and Washington Avenue to remember the teen, identified by his father and police as 17-year-old Julian Oliveros, of New Rochelle.

Investigators say a 16-year-old suspect fatally shot the New Rochelle High School student late Tuesday afternoon.

They released a photo of the weapon recovered off the suspect, which they say is a ghost gun.

The suspect faces charges of murder as well as criminal possession in the second degree.

Police have not released the name of the suspect due to his age.