Ryan Moore, 37, was convicted of first-degree murder Monday in the 2006 killings of 10-year-old David Marcial, his uncle, Larry Marcial, and a 17-year-old neighbor.
Prosecutors say Moore was on a gang-retaliation mission when he shot them.
Wednesday, Jurors heard from family members.
Larry Marcial's sister talked about her dreams for the children in the family, including 10-year-old David.
A decision from the jury is expected Thursday. Moore could receive the death penalty or a life sentence.
His co-defendant in the case is awaiting a retrial.
