Discovery of two pipe bomb confirms Eric Matthew Frein 's presence in wooded area , investigator says . Comment: He is being sought in the death of Cpl . The hard drive which Frein had access to indicated extensive Internet research on topics such as `` how to avoid police manhunts , use of various law enforcement technologies and skills related to survival , '' Bivens said . Byron Dickson in a September 12 ambush .
Discovery of two pipe bomb confirms Eric Matthew Frein 's presence in wooded area , investigator says . Comment: He is being sought in the death of Cpl . Byron Dickson in a September 12 ambush .