"Dangerous to human life or property." A violent act or an act which is intended to or likely to cause death, serious bodily injury or mass destruction.
"Mass destruction." An act which is intended to or likely to destroy or cause serious damage to transportation-related infrastructure or facilities, energy-related infrastructure or facilities, public or private buildings, places of public accommodation or public works under circumstances evincing depraved indifference to human life or property.
"Violent offense." An offense under this part, including an attempt, conspiracy or solicitation to commit any such offense, which is punishable by imprisonment of more than one year and involves an act dangerous to human life or property.
18 Pa.C.S. § 2717