GRAND PRAIRIE, Texas -- A longtime election judge was found dead in his home on election day, causing delays at a Grand Prairie polling location.

The line was long at Betty Warmack Library Tuesday morning after Judge Gary Cox didn't show up. Polls were set to open at 7 a.m., but Cox had the key to the machines and the poll book, which helps verify voter information.

The wait made some people late to work; others had to leave for work before they were able to vote.

An alternate judge arrived around 8 a.m., and the doors opened shortly after. However, poll workers had to call the Dallas County elections office to manually verify voter information until a secondary poll book arrived.

Officials tell WFAA that Judge Cox was discovered dead in his apartment after they requested a safety check. when he didn't show up to the polls. He was normally very reliable, said Toni Pippins Poole, Dallas County elections administrator.

Cox's cause of death hasn't been released.

The reason for the delay in opening polls at Warmack Library? Election judge was found dead in his home.

— Monica Hernandez (@MHernandezWFAA) November 8, 2016
Dallas County Judge Clay Jenkins asked that hours be extended at that particular polling location because it opened late.
A hearing was set for 11:45 a.m. to determine whether there will be an extension.