A Colorado man charged with burglarizing a Salt Lake home and then killing an 80-year-old woman when she walked in on him pleaded not guilty Monday to the charges.

Keith Carney, 26, of the Denver area, pleaded not guilty to first-degree murder, a capital offense, and aggravated burglary, a first-degree felony, before 3rd District Judge Kenneth Rigtrup. He was ordered to stand trial on the charges on April 23. If convicted, he could receive the death penalty.Salt Lake police received a call on Oct. 23, 1990, from a man who said he believed his roommate had just killed someone. He said Carney had returned to their apartment with blood on his hands and on his clothing. He said Carney was also carrying a large knife that he cleaned, according to court documents.

Officers arrived and found the driver's license of Klea M. Sorenson in a trash can. They went to her house at 733 E. 700 South, and found the woman dead in her kitchen. Investigators believe Sorenson was returning from a midday shopping trip and walked in on a burglary.

According to court documents, Carney also took a wedding ring, a jewelry box and a cassette radio that belonged to Sorenson.

That evening as he was booked into the Salt Lake County Jail, Carney told another man that he had committed a burglary and had stabbed and killed a woman during it, court documents state.