By CBSBoston.com Staff

CAMBRIDGE (CBS) — Nineteen-year-old Xavier Louis-Jacques has been identified as the man killed in a shooting in Cambridge early Saturday, the Middlesex County District Attorney’s Office said.

It happened on Pemberton Street near the Rindge baseball field and basketball courts around 12:40 a.m.

READ MORE: Camp Harbor View Provides A Place Of Discovery For Boston Kids

Xavier Louis-Jacques (Photo Courtesy: Rayschell McCants)

A passerby called 911 after seeing the man unconscious outside his car, police said.

First responders treated Louis-Jacques at the scene and then rushed him to Mount Auburn Hospital where he died.

READ MORE: Car Fire In Millis Extends To Auto Body Repair Shop

Louis-Jacques’s mother told WBZ-TV she believes her son was shot while trying to sell a pair of sneakers. “Xavier didn’t run with a bad crowd of kids. Xaiver didn’t get in trouble. I’m thinking somebody tried to rob him. and they killed him,” said Rayschell McCants.

According to McCants, Louis-Jacques worked as a security guard and for DoorDash.

MORE NEWS: Massachusetts' 3 Casinos Have Encouraging Month In March

Police are looking for witnesses. Anyone with information is asked to call Cambridge Police at 617-349-3300, or the anonymous tip line 617-349-3359. Anonymous tips can also be sent on the Cambridge Police MyPD app or texted to 847411, begin the text with TIP650.

CBSBoston.com Staff