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A manhunt is underway in Pennsylvania to find 31-year-old Eric Matthew Frein -- the man police say is responsible for the ambush shooting on Friday, Sept. 12, 2014, outside of police barracks in Blooming Grove, PA that resulted in the death of one state trooper and another injured another. Police say Frein is "armed and extremely dangerous" and has "survivalist" skills, and has previously made statements about wanting to kill law enforcement officials and commit mass murders.
A manhunt is underway in Pennsylvania to find 31-year-old Eric Matthew Frein -- the man police say is responsible for the ambush shooting on Friday, Sept. 12, 2014, outside of police barracks in Blooming Grove, PA that resulted in the death of one state trooper and another injured another. Police say Frein is "armed and extremely dangerous" and has "survivalist" skills, and has previously made statements about wanting to kill law enforcement officials and commit mass murders.

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Manhunt: Alleged cop killer spotted?

Possible break in dangerous, three-week long manhunt for an accused cop killer and survivalist. CNN's Evan Perez reports.

Manhunt: Alleged cop killer spotted?

Possible break in dangerous, three-week long manhunt for an accused cop killer and survivalist. CNN's Evan Perez reports.