CENTENNIAL, Colo. — Colorado authorities have made an arrest in the murder of a former Hays woman nearly two decades ago.

According to a release from the Arapahoe County Sheriff’s Office, investigators arrested Robert Lee Williams, 70, on suspicion of killing Rebecca Bartee.

Bartee was 41 when she was found dead June 7, 1999, submerged in the bathtub of her Centennial, Colo., apartment after she didn’t show up for work at the Arapahoe County District Attorney’s Office.

She had started the job only three weeks before, moving from Hays, where she had worked as a child-support enforcement attorney for the Kansas Department of Social and Rehabilitation Services.

The cold case was re-opened after a man contacted a Denver television news investigative reporter in February, saying he believed he had information on the murder. The reporter connected the man with sheriff’s investigators.

The man who said he had information said he had lived with Williams in Bartee’s apartment building at the time of her death, according to the CBS affiliate in Denver.

Williams still was living in the same apartment building when he was arrested, according to the release from the sheriff’s department.

Williams has been booked into the Arapahoe County Detention Facility on suspicion of first degree murder, according to the release. The arrest affidavit has been sealed.

Denver media reports Williams will make his first appearance in court Thursday morning.