Betsy Gotbaum called Carol Ann Gotbaum "a wonderful, wonderful person" and a great mother. She said the family was dealing with the situation "the best way we can." Carol Ann Gotbaum may have accidentally strangled herself while trying to get out of her handcuffs, Phoenix Police Department spokesman Sgt. Andy Hill said Saturday. Investigators said officers went to check on her five to 10 minutes later. Police policy requires that be done every 15 minutes. Someone close to Stiles told investigators Stiles is a "survivalist type" and always carries a weapon, Nye County District Attorney Bob Beckett said. A spokeswoman for the Maricopa County medical examiner said an autopsy would be conducted Monday morning.(CNN) -- Darren Tuck, the man who gave police a tape depicting the rape of a 3-year-old girl, turned himself in Sunday to Nye County, Nevada, authorities. Todd Allen, a Las Vegas resident, told CNN he once lived with the girl from the video and her mother. He said he recognizes his old apartment from scenes in the video. He said he knows the suspect because Allen's mother dated Stiles and the couple spent time together at Allen's apartment. Watch Allen describe Stiles and the girl » Witnesses told police that Gotbaum was "yelling and screaming" and running through the terminal Friday. She was arrested for disorderly conduct. Finding Gotbaum "unconscious and not breathing," Hill said, officers performed CPR. Gotbaum was the mother of three young children and the daughter-in-law of longtime New York City Public Advocate Betsy Gotbaum. Authorities have identified Chester A. Stiles, 37, as the suspect in the tape. A resident of Pahrump, Nevada, he remains at-large, De Meo said. Pahrump is about 60 miles west of Las Vegas. "But I have seen him verbally and mentally assault many people," Allen told CNN. "He's good with mind games. He's good at twisting people's realities and manipulating people." "According to investigators, it appeared as though Ms. Gotbaum had possibly tried to manipulate the handcuffs from behind her to the front, got tangled up in the process, and they ended up around her neck area," he said. CNN and other news organizations did so until the child was found, and De Meo asked media to stop showing the picture. "The mother has cooperated with us," De Meo said. "We believe that the mother was not aware of anything that went on with this young girl. It was very sad for her to find this out." Allen said nobody realized the child had been abused. Stiles was a distant friend of the girl's family, De Meo said. "She's what you'd expect a little girl in elementary school to be like," he said. "You would never know something like that happened. Ever." Allen said he never witnessed Stiles physically assault anyone. While handcuffed, the New Yorker became "disruptive" and she was taken to a holding room, where she was left alone, Hill told CNN affiliate KTVK. "Sometime during the time she went into custody, she went into medical distress," he said. The Dow Jones industrial average added nearly 192 points to end at an all-time high of 14,087.55 points on Monday amid hopes that banks have put the worst of the recent 'credit crunch' behind them and expectations that the Federal Reserve will continue to cut interest rates. The tech-dominated Nasdaq also gained 1.5 percent for its highest close since February 2001 while the S&P 500 gained 1.3 percent. "You're seeing a continuation of the recent momentum," said Chris Johnson, CEO of Johnson Research Group.