PEORIA, Ill. -- Jury deliberations started Thursday morning for the trial of a man accused of killing a 17 year-old last year.
Marquis Costic, stands trial for allegedly shooting and killing Treyshawn Blakely, 17, and injuring his friend Gerald Embrey, 18, during a street fight on April 7 of last year near the intersection of Warren and Butler.
Costic faces charges of first degree murder, aggravated battery and mob action.
In closing arguments, Costic's attorney Robert Pugh said there is no concrete evidence showing Marquis Costic was the trigger man, placing the blame on his brother Michael Costic.
Prosecutor David Gast countered by saying there were eye witnesses who placed both Michael and Marquis at the scene. Under law, Gast argued, the two are legally responsible for each other's actions.
Michael Costic's trial for the shooting is later this year. The defense brought him into the courtroom Wednesday as a potential witness. However, Costic used his Fifth Amendment right to not incriminate himself.