Lawyers for the family of Stephon Clark said they plan to file a federal lawsuit as soon as Friday over his death in a police shooting, CBS News reports.

Clark, a suspect in vehicle break-ins was killed March 18 in a low-light confrontation with two Sacramento police officers at the end of a foot pursuit. The officers reportedly mistook his cellphone for a gun.

The family also announced Friday the results of an autopsy performed by a specialist they hired. Clark was hit eight times out of the 20 shots reportedly fired, the independent expert reported, according to the Los Angeles Times.

Dr. Bennet Omalu conducted an autopsy days after Clark was killed by police. He told reporters that his examination showed that Clark was hit by eight bullets, and all but one entered while his back was facing police.

The county coroner's official autopsy results are not expected to be completed for several weeks.