MADISON, Wis. -- A Dane County Jail inmate is missing after he was released for a medical appointment on Sunday afternoon.

The Dane County sheriff said that Gary Lee Nelson Jr. was released for the appointment at 2:20 p.m., but he never showed up.

Nelson is serving a 90-day sentence for theft, WISC-TV reported.

Authorities said that Nelson also uses the names Joshua Humbach and Tyler Deurloo and has ties to the Williamson Street area of Madison.

Authorities are asking anyone with information on his whereabouts to call 91-1.