Witnesses at the trial in 1998 described him as a mentor to the couple and accused him of exploiting their youth to manipulate them.
In the early 1990s he was known to hang out at squats that were used by left-wing radicals and were often under police surveillance.
Maupin died of injuries sustained during a shoot-out with police and Rey, a middle-class student hitherto unknown to the police, was tried and sentenced to 20 years in jail. She was released in 2009.
Dekhar was acquitted of armed assault, but found guilty of procuring the weapon and sentenced to four years. He was released soon after, having already served his time in pre-trial detention.