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 ...

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

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

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

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

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

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

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

Paffendorf seems to have maintained a low-profile online presence, as no social media accounts linked to his name were found.

FBI agents served Alexander Paffendorf after discovering he was in contact with the shooter and coordinating an attack at a ...