Special response team member Larry Davis testified Monday that Weekley told him after the shooting that someone grabbed his weapon.
"I told him things would be OK. That's about it," Davis said.
Last week, a neighbor testified that he tried to tell officers before they raided the home that children were inside. Under cross-examination Monday, Jones said the officers were negligent.
"They knew there were children in there. So why would they come in there like that? They came to kill, and they killed a 7-year-old."
Davis, the officer who tossed the stun grenade, said the team was unaware children were inside.
When asked by prosecutors if knowing children were in the house would have forced police to change raid tactics, Davis responded: "Probably not."
It was Owens they were after. Two days before the raid, 17-year-old Je'rean Blake was standing outside a neighborhood convenience store when he was shot to death following a dispute.
Mertilla Jones testified that Owens lived in the upper unit with her daughter, LaKrystal Sanders. Police found Owens in the upstairs flat, and he was arrested.
Owens pleaded guilty in April 2011 to second-degree murder and was sentenced to 28 years in prison for Blake's slaying.