Austin Sigg practiced zip tying his mother before kidnapping, raping and dismembering 10-year-old Jessica Ridgeway 

Austin Sigg, the twisted teenager who confessed to abducting, raping and murdering 10-year-old Jessica Ridgeway in 2012, practiced zip-tying and restraining people on his own mother and slept in her bed night before was arrested for the child’s killing. Mindy Sigg seemed to laugh off her son’s increasingly-troubling behavior, according to authorities. She joked to a friend about her his fixation on body decomposition and revealed that she helped the 17-year-old practice restraining people by letting him zip-tie her, police say. Sigg, who was sentenced last week to spend the rest of his life in prison, was obsessed with mortuary and forensic science and was convinced he could outsmart detectives who were searching for Jessica’s killer. READ MORE HERE