An appeal for calm has been made as prosecutors determine whether officers are charged over an Aboriginal man's death in custody that caused national outrage.

Northern Territory Police issued the plea as the family of Kumanjayi White expressed their frustration over the investigation into the 24-year-old's death four months ago.

Two officers are set to learn their fate after the final autopsy report into Mr White's death was received and a "full and comprehensive" police brief of evidence referred to prosecutors.

Mr White, who had a mental disability, died on May 27 after being restrained by two plain-clothes officers in an Alice Springs supermarket's confectionary aisle.

Police allege the 24-year-old was shoplifting and had assaulted a security guard.

"A life has been lost and that i

See Full Page