DENVER -- A nursing home worker who pleaded guilty to stealing a diamond ring from a 80-year-old disabled resident who suffered from Alzheimer's disease was a no-show for her sentencing Thursday.

The judge has issued an arrest warrant for Ebony Michelle Butler.

Butler worked as a caregiver at Spring Ridge Park in Wheat Ridge. In October, Butler pleaded guilty to stealing the ring from Jean Mayer and trying to pawn it off. Police arrested Butler after someone had called in a tip, saying that Butler had bragged about pawning the ring for $500.

Jean's husband, Russell Mayer, said he gave Jean the ring for their wedding anniversary and she had worn it for 35 years. He noticed the ring was missing when he picked her up to take her to church, said Pam Russell of the Jefferson County District Attorney's Office.

Jean Mayer was severely disabled with stage-four Alzheimer's disease and died 10 days before charges were filed.

"I was pretty angry, and I'm still pretty angry," said Mayer's daughter, who wished only to be identified as CJ. "It has made it difficult to deal with the passing of my mom."

Butler faces two to six years in jail. She was found guilty on charges of theft, a class 4 felony, and providing false information to a pawnbroker, a class 6 felony.

It's not known if Butler will face additional charges because she did not show up for her sentencing.

Efforts to contact Butler for comment Wednesday night were not successful.

The administrator for Spring Ridge Park told 7NEWS Butler no longer works at the facility and sent the following statement.

"Spring Ridge Park will continue to implement every possible measure in cooperation with the authorities to ensure full investigation of any incident. In this particular case, the Wheat Ridge Police Department has been complimentary of our investigation procedures and our compliance with checking criminal backgrounds. We will continue to rely on the support of all community agencies as we serve those in need," said Executive Director Melonie Tindall.

CJ said her family has no complaints about how her mother was cared for, but hopes what happened will serve as a lesson to others who have loved ones in assisted living centers and nursing homes.

"If they have something that's valuable, that's precious to them and their family, they need to seriously think about not having it where someone else can get to it," she said.