Authorities are releasing new information on the alleged shooter in last week's police barracks ambush.

State police say 31-year-old Eric Matthew Frein may have changed his appearance -- namely his hair -- since then. They say he is also part of a military simulation unit, comprised of history enthusiasts who re-enact battles as European soldiers.

Frein's long-standing gripe with both the government and law enforcement dates back to at least 2006. The self-taught survivalist remains at large and is believed to be heavily-armed. Frein is accused of attacking the Blooming Grove police barracks last Friday night during a shift change. One officer was killed and another was wounded.

[Associated Press]

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