The work could take weeks, police said. Authorities are also mulling criminal charges, although it's not clear against whom.

U.S. citizens like Shamsud-Din Jabbar have become radicalized along a diverse spectrum of causes and ideologies.

Police have yet to reveal a motive for the Abundant Life Christian School school shooting in Madison on Dec. 16, but ...

Madison Police Chief Shon Barnes said Natalie Rupnow, a freshman at Abundant Life ... However, details — including a manifesto some believe was written by her — remain unverified.

Social media accounts being connected the shooter show a teenage girl immersed in an online world of school shooting glorification and white supremacy.

Natalie Rupnow's alleged writings and her father Jeff Rupnow's Facebook paint two opposing pictures of the alleged school ...

As investigators probe a 15-year-old girl's deadly rampage at a Madison school, experts grapple with a puzzling question: why are female mass shooters so rare in America?

Chief Shon Barnes told the Milwaukee Journal Sentinel, part of the USA TODAY Network, that Natalie Rupnow, a freshman ... who first posted the purported manifesto online, because “it was alleged ...