Austin Sigg, Jessica Ridgeway's accused killer: New mug shot, new cell -- in adult jail

Update, 6:09 a.m. October 25: We're learning more about Austin Reed Sigg, seventeen, busted yesterday in the kidnapping and killing of Jessica Ridgeway, a ten-year-old Westminster girl who vanished en route to school on October 5 and was found dead the following week. Revelations thus far involve an interest in criminal investigation, references to forensics and mortuary science, alternately shocked and creeped-out acquaintances and a father with a criminal past.

A smiling Austin Sigg, in a photo obtained by 9News.

The custody report on Sigg, on view below, identifies him as a student at Arapahoe Community College, where sources who spoke with the Denver Post say he was focused on studying mortuary science -- no doubt a terrifying thought for loved ones of Jessica, whose torso was found in an Arvada open space area.

Prior to that, 9News reports, Sigg attended Witt Elementary (the same school to which Jessica was walking when she disappeared), Wayne Carle Middle School and Standley Lake High School -- and along the way, he took part in a Jeffco concert choir. Other interests reportedly included World of Warcraft and Call of Duty.

However, Sigg is said to have left the the high school during his eleventh grade year in favor of completing his GED and enrolling at Warren Tech, where, the Post notes, he "worked toward a career in health occupations or forensic science and won second place in the spring in a Health Occupations Students of America competition in the category of crime-scene investigation."

A photo of Sigg in a Jeffco choir, obtained by 9News.

Anecdotes about the young man vary widely. In another 9News piece, a young woman who describes Sigg as her first boyfriend (they dated in middle school and high school) calls him a sweet guy whom she first met at Warehouse: 180, a gathering place for Christian teens. (As you'll recall, Westminster police released a photo of a small wooden cross considered vital evidence in the inquiry into Jessica's slaying -- and Sigg can be seen wearing a necklace of some sort in his mug shot.) Yes, he had a collection of swords and knives, she concedes, but he also loved music and gave her no indication of evil lurking within.

An undated photo of Austin Sigg from 9News.

Not so a woman who told 9News about encountering Sigg and friends at Standley Lake. She remembered him watching her in a way that "freaked me out."

Meanwhile, Fox31 dug into the background of Robert Sigg, Austin's father -- and he's left quite a paper trail. The station documented a slew of arrests for offenses that include assault and battery, resisting/obstructing arrest, domestic violence, driving under the influence of drugs, being a habitual traffic offender and more. Robert, who was divorced from Austin's mother, Mindy, eleven years ago, is said to be the owner of Performance One Media in Centennial (the company's website is down, as is his personal one), and while he's reportedly been in Mexico on business, his Parker home is being targeted for police search.

One matter given relatively little attention amid the news of Austin Sigg's arrest: Although he's a juvenile, the Westminster police immediately released his name and photo. This actions suggest strongly that he'll be charged as an adult. Nonetheless, his age means the death penalty is off the table. The most severe sentence he can possibly receive is life in prison. And yes, he's reportedly confessed.

Look below to see a Robert Sigg booking photo and reports from Fox31 and 9News. Those items are followed by our previous coverage, including a larger look at Austin Sigg's mug shot, the custody report and more.

Robert Sigg.

Continue for our previous coverage, including photos and videos.