EDISON - Audio recordings obtained by News 12 New Jersey of 911 calls made during the deadly Pathmark shooting in Old Bridge give chilling insight into gunman Terence Tyler's countenance moments before the shooting rampage.

In the recordings, co-workers describe Tyler as seeming "very angry", leaving the store "mumbling."

According to police, 23-year-old Pathmark employee Terence Tyler left the store that night only to return moments later with a gun and start shooting. Tyler killed 18-year-old Cristina LoBrutto and 24-year-old Bryan Breen before turning the gun on himself.

Tyler was discharged from the Marines in 2010 after suffering from depression. Investigators have given no motive for the shooting.

AUDIO: Old Bridge Pathmark 911 calls