The reward for information leading to the capture of Michael Thomas Osborn is now $7,500.
The 46-year-old was last driving a black 2007 Ford Expedition with Texas license plates.
The Texas Department of Public Safety says Osborn's criminal history includes possession of child pornography, aggravated assault against a public servant and unlawful carrying of a weapon.
Osborn is 6 feet tall and weighs approximately 240 pounds. He has tattoos on his left arm and left ankle; and scars on his left leg and above his left eye.
He has ties to the Houston area, particularly Deer Park - the city of his last known address. Osborn also has ties to the states of Louisiana and Florida.
If you have any information in this case, call Crime Stoppers at 1-800-252-TIPS.