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TAMA, Ia. -- A volunteer firefighter, who is supposed to be saving lives, is accused of risking them by setting some of the blazes he helped battle. One after another, Tama volunteer firefighters have been dealing with several suspicious fires over the past few months. They suspected they had an arsonist on their hands, but they never dreamed it could be one of their own until now.

Eighteen-year old Tama volunteer firefighter Justin Anderson, a high school senior who is scheduled to graduate Sunday, is charged with seven counts of arson. He's the son of long-time Fire Chief Rod Anderson. Investigators believe Justin Anderson set at least three vacant homes on fire, and also started several grass fires.

"We've had numerous calls of potentially set fires," says Tama County Sheriff Dennis Kucera, "Some of them involved structure fires. Vacant properties."

"He's a good kid. I'm blown away actually because he's a good kid, you know?" says neighbor Mitch Fricke, "I can't see him doing it. That's why it's hard for me to believe that he did what he did."