Officials seized guns and ammunition from Alexander Paffendorf after he allegedly admitted to communicating with Natalie ...

The FBI has detained Alexander Paffendorf, a 20-year-old man from California for allegedly conspiring with the 15-year-old ...

Alexander Paffendorf had allegedly planned a mass shooting at a government building in a parallel and coordinated attack with ...

FBI agents interviewed Alexander Paffendorf, 20, late Tuesday, according to a court order obtained by The Washington Post.

A California man, Alexander Paffendorf, 20, has been detained for allegedly conspiring with 15-year-old Natalie Rupnow in the ...

Authorities detained a California man and seized guns and ammunition from his home in the ongoing investigation into the ...

Authorities say Alexander Paffendorf told the Madison school shooter he planned to attack a government building.

Investigators are still trying to figure out a motive for the shooting in Madison that killed a teacher and a student.

Alexander Paffendorf, of Carlsbad, exchanged messages with Natalie “Samantha” Rupnow, 15, about targeting a local government building.

Authorities are unraveling a chilling case involving a 20-year-old California man and a 15-year-old Wisconsin girl who ...

A judge in San Diego has granted a protective order against a Carlsbad, California man who authorities say was communicating ...

During an FBI interview, Paffendorf admitted to communicating with Rupnow about arming himself with explosives and a firearm ...