Steamboat Springs The man police believe killed Steamboat Springs resident Lori Bases was formally advised of the charges against him in Routt County Court on Wednesday.
Thomas Johnson, 29, was arrested Friday after allegedly admitting to his ex-wife that he killed Bases, 31.
This week, the district attorney's office filed four charges in connection with the May 11 stabbing death of Bases. The charges include two counts relating to murder first-degree murder and felony murder.
First-degree murder is the intentional and deliberate killing of a human being, and involves having an opportunity to give it thought, according to District Attorney Paul McLimans.
Felony murder means that while a person is committing a felony, someone is killed. In Johnson's case, the felony is alleged to be attempted first-degree sexual assault.
Both murder charges are Class 1 felonies and carry a sentence of life imprisonment or death.
The other two counts relate to the vandalism of Bases' Toyota Rav4. Johnson was charged with first-degree criminal trespass and criminal mischief for April 9 and April 10 slashings of the sport utility vehicle's tires, seats and dashboard.
The trespass count is a Class 5 felony, which can carry a sentence of six months to eight years in prison; the mischief count is a Class 4 felony and carries a sentence of one to 16 years in prison.
A preliminary hearing in Johnson's case is scheduled for July 31. The judge will determine at that time whether there is probable cause for the case to go to trial.
Johnson is being held without bond at the Routt County Jail.