The attorney for the family of a woman who was killed after being taken hostage during a Northern California bank robbery says he wants to know whether police followed protocols.

The woman, Misty Holt-Singh, was found dead at the end of last month's robbery and kidnapping in Stockton, which included a running gunbattle between police and the suspects. Police are investigating whether Holt-Singh was shot and killed by the suspects or officers.

Attorney Greg Bentley says he filed public-records requests on Thursday for 911 calls and protocols for kidnappings, pursuits and the use of deadly force. Bentley tells The Record of Stockton (http://bit.ly/1sbWdOl) he wants to know whether police made mistakes or suffered a communication breakdown.

Stockton police spokesman Joe Silva said he had not received the request.