Possible motive in missing Colorado mom case revealed

A wrongful death lawsuit filed by Kelsey Berreth's parents offer clues into a possible motive.
1:48 | 02/16/19

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Transcript for Possible motive in missing Colorado mom case revealed
with the new developments in the case of a missing mother from Colorado. A lawsuit filed by Kelsey Berreth's parents pointing the blame at their daughter's fiance and now bringing up a possible custody battle. This morning, new details into a possible motive in the case of missing Colorado mom Kelsey Berreth. If youly filled court documents brought by Berreth's parents alleging Patrick Frazee murdered his fiance over their 1-year-old daughter Kaylee. The lawsuit claiming Frazee killed Berreth because he wanted full custody of Kaylee and/or Kelsey to leave Kaylee with him and Kelsey would not agree. The complaint alleges Frazee told Berreth's mother they broke up on Thanksgiving day and Kelsey agreed to share with Frazee 50/50 custody of their daughter. Berreth last seen in public here at this safeway supermarket on Thanksgiving day in woodland park. Her cell phone turning up three days later 700 miles away in Idaho. You see him. He's in cuffs. Reporter: Investigators arresting Frazee December 21st charging him with first degree murder in Berreth's death even though her body hasn't been found. The complaint alleging Frazee had an opportunity to kill Kelsey or have Kelsey killed and that he had her keys and because he had her gun, she was vulnerable to an attack. Earlier this month Idaho nurse Krystal Lee Kenny pleaded guilty to helping Frazee allegedly dispose of Berreth's cell phone. I learned that Patrick Frazee had committed a homicide. I moved T victim's cell phone with the intent to impair the phone's availability in the investigation. Patrick Frazee is scheduled to be back in court this coming week for a preliminary hearing. A lot of questions still in this case. They don't know exactly what happened. They still haven't found her body yet, right?

This transcript has been automatically generated and may not be 100% accurate.

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