Ari Liggett, 24, was taken into custody Wednesday after a car chase and crash in Greenwood Village at East Orchard Road and South Dayton Street.
Police were looking for Ari Liggett and his mother after they both disappeared from their home in Centennial.
Arapahoe County sheriff's officials determined through monitoring credit card transactions that the two traveled to the Western Slope early Tuesday. Around 1:30 a.m. Wednesday, they noticed a car associated with the mother and son driving near the family's home.
When investigators checked out the home, Liggett shares with his mom, they found a liquid that may be potassium
Ari Liggett was involved in another bizarre incident two years ago involving what was thought to be cyanide.
The Boulder Daily Camera reported in March 2010 that Liggett was arrested on a weapons charge for a homemade silencer. He led police to a Boulder homeless shelter where he had stored potassium ferrocyanide in a locker.
That's a less dangerous form of the substance than what was found in the home. Liggett ended up with a year's probation for that incident.
He'll be in court Thursday morning. It's expected he'll be charged with first degree murder.
(KUSA-TV © 2012 Multimedia Holdings Corporation with The Associated Press)