The 18 year-old was reportedly found near the Echo Lake Lodge at the base of Mount Evans in Clear Creek County.
They say she has not made a specific threat but say her fascination with the Columbine shooting and the gunmen and her recent actions raised suspicions.
Because of the threat, Columbine and more than 20 other schools outside Denver locked their doors for almost three hours Tuesday afternoon, and some canceled evening activities or moved them inside.
This is a developing story.
He said once they detain her, they will hold her for as long as they legally can.
Jefferson County Sheriff Jeff Shrader said he didn't believe there was an active pursuit when she was found dead, though there were plenty of staff on the ground searching in different areas.
The doors were locked at Columbine and more than 20 other schools in the Denver area as the sheriff's office said it was investigating threats against schools related to an FBI investigation. Surfside officers turned the case over to Miami Beach police detectives, who found her "deeply disturbed" online postings and immediately notified the Federal Bureau of Investigation, according to a law enforcement source.
Authorities have posted pictures of Pais, her unsmiling visage framed by shoulder-length brown hair.
The FBI said Pais was "considered to be extremely dangerous" and "made threats to commit an act of violence in the Denver metropolitan area".
Gov. Jared Polis is assuring Colorado residents that federal, state and local law enforcement are "dedicating all of their resources to locate this unsafe individual".
Both times, surveillance video captured a woman performing a sex act on Kraft and showed him paying in cash, according to police. If the footage can't be used in court, Kraft will likely have an easier path to freedom.
Police said they then shot and killed the deer at the scene near Wangaratta , a city roughly 250 kilometres from Melbourne. A recent study into all deaths caused by animals in Australia between 2000 and 2013 found none had involved deer.
The Downdetector.com has a live outage map, which showed that most of the reported incidents were located in Europe and in Asia. The downtime was from 11:30 to 14:50 BST, before Facebook was able to resolve the connection issues.
However, he did confirm that the PlayStation VR headset as it now exists will be compatible with the next PlayStation console. Because it is based on the same hardware architecture, it will also be backwards compatible with PlayStation 4 games.
Even Magneto, who makes the mistake of issuing a threat in her direction, finds himself bested by her incredible power. During a rescue mission in space, Jean is almost killed when she is hit by a mysterious cosmic force.
With its new credit card Apple is betting that younger consumers will value convenience and privacy over generous cash rewards . However, the Cupertino-based company has confirmed the service will come to the United Kingdom and Australia later this year.
In November he sought refuge in the Uruguayan Embassy and applied for asylum but he left the next month after it was denied. The attempted arrest took place at 6:30 a.m. (1130 GMT) at Garcia's home in the posh Miraflores neighborhood of Lima.
The Easter Bunny was a popular guest at Saturday's Easter egg hunt sponsored by the Point Pleasant Presbyterian Church. The Governor's Easter egg hunt happens each year on the Saturday before Palm Sunday.
Barca now progress to the semi-final stage of the competition, as they bid to win their sixth Champions League title. We were always underdogs but we had to back ourselves and believe. "You have to lift them (the players)".
Hedman ruled out for Game 4 as Lightning look to avoid sweep
The Lightning is down 3-0 in the series and is just one game away from a First-Round exit in the 2019 Stanley Cup Playoffs . A 5-1 rout followed in Tampa , and then a 3-1 win in Columbus on Sunday night set up the sweep. "We have to keep going".
Juventus vs. Ajax Amsterdam - Football Match Report
In the history of the Champions League , no players have been better than Lionel Messi and Cristiano Ronaldo . "It's unbelievable. Erik ten Hag's team had the youngest average age - 24 - of all the teams in the knockout stages of this year's competition.
Fordham University student dead in bell tower fall
A Fordham spokesperson told INSIDER that the university is investigating how the students gained access to the building and tower. Police said that they were alerted to the incident, on the campus of Fordham University in the Bronx, at about 3:20 a.m.