Killed on Easter-monday, 23 april 1962 in a forest outside the town of Dinslaken-Bruckhausen, north of Duisburg
13 years old
Found the next day amongst some bushes.
Strangled with her scarf, raped and partially cut up. Kroll ripped the red dress from her body and then removed both buttocks as well as the left forearm and hand.
Petra was visiting a fair with a friend, and there Kroll probably lured her away and abducted her to carry her outside of town.
Police suspected and arrested minor sex-offender and pedophile Vinzenz KUEHN (52). He was sentenced to 12 years imprisonment and psychiatric treatment. He was released after 6 years.