An official autopsy report released Tuesday on the death of Stephon Clark, an unarmed black man who was fatally shot by two Sacramento police officers in March, varies substantially from a private autopsy that contended he was hit primarily while facing away from the officers.

Mr. Clark, 22, was hit by seven bullets, according to the report released Tuesday by the Sacramento County coroner’s office, not eight as a private autopsy, arranged for by Mr. Clark’s family, had found. According to the county report, three of the bullets entered Mr. Clark’s right side and three entered on the right side of his back. An additional bullet entered Mr. Clark’s left leg. The private autopsy found that most of the bullets had struck Mr. Clark in the back.

Dr. Gregory Reiber, a forensic pathologist whom Sacramento officials asked to review the autopsy conducted by the county, said the apparent sequence of the bullets does “not support the assertion that Clark was shot primarily from behind.” The private autopsy mistook one exit wound, to the left torso, for an entrance wound, Dr. Reiber said.

“This is a significant error, as it leads to incorrect conclusions regarding the relative positions of the victim and shooters during the event,” he said.