Shkeku Bayoh died after being restrained by police officers in Kirkcaldy, Fife, in 2015.

The move follows calls for its scope to be widened to include Crown Office decisions not to prosecute anyone.

The force has dropped plans for a judicial review of calls to extend the remit of the investigation.

Sheku Bayoh died after being restrained while in police custody in Kirkcaldy, Fife, on 3 May 2015.

Kate Forbes says she has written to all the core participants and will respond as quickly as she can.

Sheku Bayoh's family want the inquiry to investigate the Crown Office decision not to bring any prosecutions over the case.

Aamer Anwar says Scotland's criminal justice institutions failed to deliver "truth" about Mr Bayoh's death.

BBC Scotland has learned how much public bodies have spent on the four public inquiries currently taking place.