As authorities began investigating a mysterious explosion at a Woburn ATM on Sept. 4, federal prosecutors say the man responsible was looking up news articles about his alleged crime.

Christopher Silva, 43, was arrested at his Stoneham home in late October after investigators allegedly used DNA evidence and surveillance footage to identify him as the culprit.

A federal grand jury indicted him last month on a charge of maliciously damaging, by means of an explosive, property used in interstate commerce — a crime punishable by at least five years in prison, up to three of supervised release, and a maximum fine of $250,000.

Silva is scheduled for arraignment Dec. 9. His attorney did not respond to a request for comment Wednesday.

Prosecutors allege Silva was caught on camera putting

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