Stockton Chief of Police Eric Jones announced Monday that the hostage killed in last month’s bank robbery shootout was killed by police, not by suspects, according to preliminary ballistic reports.

Misty Holt–Singh, 41, was one of three women taken hostage as suspects exited the bank. Holt-Singh’s 12-year-old daughter was waiting outside in the car.

Holt-Singh and suspects Alex Gregory Martinez, 27, and Gilbert Renteria Jr., 30, were found dead at the end of the chase and gun battle.

The sole surviving suspect 19-year-old Jaime Ramos used Holt-Singh as a human shield and was shot over ten times, according to Chief Jones.

Jones says he has since met with the victim’s husband, Paul Singh, and in her memory, has vowed that the department will look at all of its protocols.

Ramos has since been charged with murder.

The department is still looking for tips to arrest the fourth suspect, who is still at large.