Someone posted the officers' private information online, including names, addresses and details about their kids' schools.
CBS2/KCAL9 is not reporting that information.
The LAPD would not confirm if the officers targeted were involved in Sunday's fatal shooting at Union Rescue Mission after a struggle during which, officers say, the shooting victim went for one of their guns.
The man was initially identified by law enforcement sources as Charley Robinet, a French national convicted in 2000 in a bank robbery in Thousand Oaks. However, the French consulate has confirmed the victim is not a French citizen but stole a Frenchman's identity.
Court documents obtained by CBS2/KCAL9 indicate authorities filed a petition during the man's time in federal lockup to determine his mental condition, stating he was "in need of hospitalization in a suitable psychiatric facility."
That petition was withdrawn months later, and he voluntarily agreed to hospitalization and treatment before his release in May. The final records are sealed.
Hundreds marched to LAPD headquarters earlier Tuesday, voicing their disgust over the officers' actions at the Police Commission meeting.
"We all saw murder; do what you want," one man said.
"You've gotta do better. We expect better," another added.
Police Commission President Steve Soboroff says all evidence will be reviewed to determine "whether this use of force was in or out of policy."
The LAPD also confirmed all four officers involved had mental illness training, and two participated specialized training.
The director of that training, Luann Pannell, says a suspect's behavior dictates what measures the officers must take.
"If there's safety concerns they have to respond in whatever means they can to keep the situation safe," Pannell said.
A LAPD commander says they don't expect to release the names of the officers involved until it's determined there are no credible threats against them.
U.S. Marshals say a warrant was issued for Robinet's arrest in January after he didn't submit his monthly report to his probation officer after his release in spring.
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