The medical examiner's official autopsy report for Tyre Nichols showed he "died of brain injuries from blunt force trauma," the district attorney's office told Nichols' family Tuesday.

While Nichols' mother has said that first responders told her her son was drunk and high, the report shows that Tyre's blood alcohol level was .049, the DA's office said. The district attorney's office told the family that was "well less than the legal limit to drive."

Nichols' mother never believed her son was inebriated at the time of the incident.

The district attorney's office told the Nichols family that the autopsy will be released publicly soon.

This is a developing story. Please check back for updates.