Bamber certainly hasn't confessed.
Why confess to something you didn't do ?
Poor Stefan Kiszko confessed to something he didn't do because he was probably hounded to do so,but was sadly simple of mind to have gone along with it. The saddest case I ever read as both he and his mother died through the strain of having been accused and the name-calling that they'd both endured.
That horrendous case was the fault of the investigation team.