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

A California man apologized for his connection to the 15-year-old shooter who killed a student and teacher in a Madison ...

A California man apologized for his connection with the Madison school shooter. SAN DIEGO - A California man apologized ...

A California man apologized Friday for his connection to a 15-year-old girl who fatally shot a teacher and a fellow student ...

Alexander Paffendorf was detained late last month after FBI agents said he was plotting a mass shooting with Natalie "Samantha" Rupnow.

A hearing for a gun violence restraining order Friday against Alexander Paffendorf, 20, was continued until April ...

A Carlsbad man who authorities say communicated with a Wisconsin school shooter appeared in a San Diego courtroom on Friday.