How the teen killer wiped the girl’s torso clean of DNA before dumping her remains
- Austin Sigg, 18, was sentenced to spend the rest of his life in prison
- Sigg was obsessed with forensics and was convinced he could outsmart detectives
- He showed 10-year-old Jessica Ridgeway cartoons and then told her to turn away from him before strangling her to death
- Ridgeway wrote ‘Beware of strangers!’ in her school journal
- He slept in his mother’s bed the night before he told her about the murder
- Sigg’s mother Mindy laughed off her son’s morbid fascinations, a friend told police
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.
He wiped the child’s torso clean of DNA evidence after he strangled and dismembered her – then brazenly offered a sample of his own DNA to police when they took swabs from all of the men in Jessica’s neighborhood in Westminster, Colorado.
Police initially bungled the DNA test – losing the sample he handed over that matched him to both Jessica’s murder and the attempted abduction of a jogger months earlier.
Despite Sigg’s bizarre behavior and morbid fascination – his parents sent him to a Christian counselor in an attempt to set him right – Sigg had a girlfriend, at whose house at spent at least one night a week, it was revealed.
The Denver Post reveals a host of chilling new details about the crime that shocked the Denver suburb and horrified the nation last October.
Sigg snatched Jessica off the street as she walked home from school after he happened to spot her while he was out ‘hunting’ for a victim to kidnap and kill, he admitted to detectives.
Jessica had been told about the threat that ultimately cost her her life – she wrote two reminders in a journal found in her desk at school: ‘Do not play at the park alone’ and ‘Watch out for strangers!’
Despite Sigg’s parents’ initial concern about his fascination with decomposing bodies and violence, it soon became a laughing matter for his mother Mindy Sigg.
A friend told police that Mindy joked about his strange habits. Ms Sigg even said that she had practiced zip-tying and restraining someone with her son, according to authorities.
Jessica’s disappearance on her way home from school caused panic among parents across Denver, who feared their children were not safe
When Sigg snatched Jessica off the street, he immediately bound her hands and feet after throwing her into his SUV.
Jessica was confused and scared and wet herself. She kept asking if Sigg knew her mother, Sigg later told police.
‘I would tell her that everything was going to be OK. I would just lie to her,’ he told detectives.
He told police he took Jessica back to his house and cut the ties that bound her. He sat her in front of a TV and let her watch cartoons.
He stripped her out of her wet clothes and made her change into a white t-shirt and black shorts from her closet.
He eventually brought her to an upstairs bedroom at his mother’s home, where he sexually assaulted her and then strangled her using zip ties and his hands.
He cut his hand in the process, as police photos show.
He dismembered her body and initially hid her remains in a pool house behind his mother’s home. He stashed some of Jessica’s belongings in a crawl space under the house.
He then dumped her remains in a garbage bag off a highway – but not before he wiped down Jessica’s torso. Investigators had to swab the remains twice before they could even get a partial DNA sample.
When police came around to his house as part of a neighborhood-wide sweep to collect DNA samples, Sigg brazenly offered his up – thinking that there was nothing that could trace him back to the crime.
What he didn’t know is that police had collected DNA from the attempted abduction of a jogger four months earlier – and that they also had DNA from the urine-soaked clothes that Sigg had stuffed in Jessica’s backpack and dumped in town.
When local media reported that police had linked the two cases, Sigg told classmates at school that he felt ‘tremendously’ ill and ‘wobbly,’ the Post reports.
That night, he slept in his mother’s bed. The next morning, he confessed his crime to Mindy Sigg – who called police.
After his arrest, he led police to the crawl space, where he had kept some of Jessica’s remains. A crime scene photo shows a black plastic garbage bag.
Police found a broken black zip-tie in Sigg’s Jeep SUV. They found bleach and black plastic trash bags on his porch – the same as Jessica’s remains had been found in.
A photo of the basement where Sigg spent much of his time and his bedroom show a profound mess.
Dirty clothes and dirty dishes are piled high. A pair of samurai swords sit above his bed.
In his dirty laundry, police found a cross necklace – similar to one that they had found in Rideway’s backpack.