Keirin McMillan, 20, Aron McMillan, 17, and Levi Hunter, 16, murdered Alasdair Forsyth in Edinburgh.
Police Scotland said it would offer Gary Webb an unreserved apology.
The 28-year-old man’s body was pulled from the River Forth on Sunday night.
Professor Jean Maclellan OBE, director of Autism Network Scotland, will lead the Significant Care Review.
Darren Brownlie, 47, died at HMP Low Moss in East Dunbartonshire on Monday.
Tributes have been paid to 25-year-old Natalie Faulds following her death at the weekend.
The two robberies and one attempted robbery were carried out in Glasgow and East Dunbartonshire on Friday.
A 26-year-old man died after a Ford crashed at Camperdown Park in Dundee.