Tucson police say they've made an arrest in the killing of a 30-year-old man that had gone unsolved since 1990.

Police say a civilian hired to review unsolved cases took a new look at the slaying of Angel Pena in September. Detectives then reopened the investigation, did follow-up interviews and analyzed additional evidence.

After receiving results from DNA tests, the new evidence and witness statements were presented to a grand jury, which returned an indictment against 57-year-old Jorge Luis Diaz-Alonso. Police said on Monday that he has been transferred from a federal prison to Pima County custody to face a first-degree murder charge.

Pena was shot at a Tucson hotel. Several potential suspects were identified, but the case went cold.