"Turning" this type of "evidence" means giving testimony to implicate accomplices
The corrboration of an accomplice is of two kinds: the first is that corroborating 
evidence which... [DOC] [TLE] State's Evidence legal definition of State's Evidence - Legal Dictionary [PAR] A colloquial term for testimony given by an Accomplice or joint participant in the ... 
A prosecutor may give a testifying defendant full immunity, which means the 
defendant ...