Here’s a look at the timeline of events in a series of killings that culminated in a Jan. 20 highways shootout that killed a Border Patrol officer in Vermont.

Agent David “Chris” Maland died in a shooting following a traffic stop, the FBI said. A second person killed in the incident was a German national in the country on a current visa, authorities said.

A traffic stop in Vermont has cracked open a cultlike group called Zizians linked to six deaths in three states

The killing of U.S. Border Patrol Agent David Maland is tied to a cultlike group that federal prosecutors have linked to five other homicides in Vermont, Pennsylvania and California.

The killing of U.S. Border Patrol Agent David Maland near the Canadian border last month and five other homicides in Vermont, Pennsylvania and California have been tied to a cultlike group. Interviews and online postings reveal how young computer scientists described by those who know them as highly intelligent appear to have become increasingly violent.

The killing of U.S. Border Patrol Agent David Maland near the Canadian border last month and five other homicides in Vermont, Pennsylvania and California have been tied to a cultlike group

The killing of a U.S. Border Patrol agent near the Canadian border last month has been linked to a cultlike group at the center of five other homicides in three states.