SAGINAW, Mich. (AP) — The mother of a mentally ill man who was fatally shot by Saginaw police said Monday night that the fight for her son's justice will continue even though prosecutors aren't filing charges against the officers involved.

Jewell Hall spoke during public forum at a local church that was organized to discuss the death of 49-year-old Milton Hall, who was shot 11 times by police in a parking lot on July 1. Police have said Hall refused to drop a knife, and that 46 rounds were fired by six officers.

"I'm stunned, I'm still in disbelief," she said during the meeting. "Milton Hall didn't do anything that warranted being shot at 46 times and killed."

Hall said she wants to see police held to a higher standard in such cases, but added that anyone who doesn't meet that standard must be "punished to the fullest extent of the law," The Saginaw News reported ( ).

She said independent investigations are under way, but she also asked for national support.

"Several organizations are working hard to fight for justice for Milton Hall and to bring much needed change in Saginaw," she said. "But for true justice, it is great to have the national community involved. My history and my age tells me, anything that changes, it's because the national community is involved."

U.S. Rep. John Conyers, a Democrat from Detroit, also attended the meeting and said the case is a national issue, saying "we're all in this together." He listed to witnesses relay what they saw the night of the shooting and promised to return to Saginaw.

Saginaw County Prosecutor Michael Thomas announced last week that no criminal charges would be filed against any of the police involved.

Hall lives in Rio Rancho, N.M., where she is a critic of what she considers to be excessive force by police in nearby Albuquerque. She has said she never thought she would find herself so personally involved in the fight.