Texas Judge Tom Greenwell was found dead inside his chambers Monday night.
According to The Corpus Christi Caller Times, authorities responded to the courthouse around 7 p.m. after receiving a report a man had been found with a gunshot wound to the head.
Authorities reported it is unclear how a gun could have passed through security.
The Nueces County Sheriff's Department is the lead investigating agency in the fatal shooting.
Greenwell was elected judge of the 319th District County in 2001. He was serving his third term at the time of his untimely death.
*The Corpus Christi Caller Times contributed to this report.