The violent deaths, including of a Border Patrol agent in Vermont, a landlord in California, and a couple in Pennsylvania, have led law enforcement to a group with obscure ideas.

Experts say the loose group is best described as a fringe religious sect, an affinity group or maybe even a small gang.

The apparent leader of a bizarre vegan transgender cult, the Zizians, has been linked to six killings across the country, including the murder of a Border Patrol agent and the death of a Vallejo ...

The group, which espouses rationalist philosophy, are connected to at least 6 homicides in the U.S., potentially including ...

In the Bay Area, a place teeming with brainy computer scientists, an intellectual movement called “the rationalists” debates ...