Daniel Doherty (23) and William Fleming (19) were shot dead in the grounds of the Gransha Hospital in Derry in December 1984. Relatives of the two men have  claimed the SAS soldiers did not provide full details on the ambush when interviewed by Royal Ulster Constabulary detectives in the wake of the killings. Photograph: Stephen Hird/Reuters

A senior detective has been appointed in a bid to obtain fresh statements from six SAS soldiers involved in the ambush and killing of two suspected IR(...)