His daughter told TMZ that he died while in Evansville, IN, to attend Horror Con.
He checked into a hotel and suffered a massive heart attack while sleeping, she said.
He worked continuously for several decades in film, video games, radio and commercials as a voice artist.
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The Evansville Horror Con, where Dodson was scheduled to appear, posted a tribute to Facebook.
We are heartbroken to announce the sudden passing of Mark Dodson last night.
Mark was not only a talented voice actor but also a cherished member of the horror community.
Our thoughts and prayers are with his family, friends, and fans during this incredibly difficult time.
His legacy will live on through his work.
Survivors include his daughter and several grandchildren.
