A controversial Colorado “birther” radio host has lost his job after an in-studio brawl with a longtime associate and producer. According to Denver’s Channel 9 News, Peter Boyles was fired by KHOW in the wake of a “heated physical exchange” with producer Greg Hollenback.

What sparked the fight is unknown, but it reportedly took place on May 23, mere minutes after U.S. Rep. Tom Tancredo (R-CO) visited the studio to announce on Boyles’ show that he is seeking the Colorado governorship in 2014. Moments later the melee erupted and Boyles was observed “throttling” his friend and coworker of 20 years.

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Other witness reported seeing angry red marks on Hollanbeck’s neck after the attack.

Boyles was off the air the next morning and has not returned to the show since the incident. KHOW announced on Tuesday that the station and Boyles will be parting ways.

Raw Story readers may remember Boyles for the billboards he helped erect in Denver accusing President Barack Obama of being in cahoots with Nidal Hassan, the former U.S. Army major who killed 13 and wounded 32 in a shooting rampage at Ft. Hood Army Base in Texas. Boyles also supported a number of billboards and signs in the Denver area demanding to know “Where’s the birth certificate?”, insinuating that Obama was born abroad and is working to undermine the U.S. from within the government.

In September of 2012, Boyles joined in speculation that the president is secretly gay, running the headline, “Some People Think Barack Obama is a Homosexual,” which the KHOW station website later scrubbed.

Watch video about this story, embedded below via Denver’s News 9: