CRIPPLE CREEK, Colo. — Fourth Judicial District Attorney Dan May acknowledged the risk the prosecution took to secure a conviction against the man who killed Kelsey Berreth. 

“We did a deal with the devil, and I’m not proud of that,” May said during a news conference outside the Teller County Courthouse Monday evening. “But, there’s no question Kelsey wouldn’t have had justice today without making that deal with the devil.” 

May was talking about Krystal Lee, a nurse from Idaho who admitted she knew about Patrick Frazee’s plan to kill his one-time fiancee and the mother of his child, but didn’t do anything about it. 

In fact, Lee said she drove from Idaho to Colorado after Frazee called her and said she had a “mess to clean up.” Lee admitted to cleaning up a grisly scene inside of Berreth’s apartment, and said she watched Frazee burn the 29-year-old’s remains in a trough on his property in Florissant.

Patrick Frazee
KRDO

RELATED: Krystal Lee told coworkers she’d gotten herself into a ‘bad situation’ after Kelsey Berreth’s disappearance

RELATED: Witnesses corroborate parts of Krystal Lee's testimony about the murder of Kelsey Berreth

RELATED: Why Krystal Lee didn’t call law enforcement, waited to tell the truth about Kelsey Berreth

Berreth was killed on Nov. 22, 2018. Lee admitted to disposing of her cellphone in Idaho three days later, on Nov. 25, 2018 — and didn’t tell her story to investigators until Dec. 20, 2018, when she had already signed a plea deal. 

Lee has pleaded guilty to tampering with evidence for disposing of the phone and testified against Frazee, who was convicted of first-degree murder, solicitation to commit first-degree murder, and tampering with a deceased human body on Monday after a jury deliberated for fewer than four hours. 

“We didn’t pick [Lee], the defendant did,” May said. “So in the end we concentrated on who killed Kelsey.” 

RELATED: Video shows Krystal Lee showing investigators where she said suspect burned Kelsey Berreth’s body

RELATED: Krystal Lee recounts Kelsey Berreth's alleged last words and her complicated relationship with the murder suspect

Kelsey Berreth murder case
A jury found Patrick Frazee, 33, guilty of killing Woodland Park mother Kelsey Berreth. He was sentenced to life without parole for first-degree murder plus 156 years.
KUSA

Lee could avoid prison time altogether. She is slated to appear in court on Dec. 2, but may not be sentenced until later. Her maximum sentence for tampering with evidence is up to three years in prison. 

Frazee has been sentenced to life without parole plus 156 years. 

In a letter read at his sentencing, Cheryl Berreth asked that Lee receive the maximum sentence, saying that even though she didn’t wield the murder weapon, she was complicit in an unthinkable crime. 

“Her so-called relationship with Patrick was so valuable to her that she chose to aid in the murder,” Cheryl Berreth wrote. “We have yet to see any remorse for anything other than getting caught. She shouldn’t have received the plea deal that she did. She was an active participant in the murder. 

“All she didn’t do was swing the bat.” 

RELATED: 'She mattered': Kelsey Berreth murder suspect sentenced to life plus 156 years

RELATED: Inmate: Kelsey Berreth murder suspect had asked for help murdering Krystal Lee before trial

SUGGESTED VIDEOS | Kelsey Berreth case