The suspected killers of U.S. Border Patrol agent David Maland were reportedly part of a vegan, "anarchist" cult whose members have been linked to a series of crimes.

The FBI announced the arrest of a suspect Friday in the killing of U.S. Border Patrol Agent David "Chris" Maland near the Vermont-Canada border.

The fatal shooting occurred Jan. 20 in Vermont when Border Patrol agent David Maland stopped a vehicle on Interstate 91, about 20 miles south of the Canada border.

As the sprawling investigation unfolds, here’s an overview of the key figures involved and their alleged connections.

Michelle J. Zajko, 32, allegedly gave guns to pair accused in Border Patrol agent's shooting death. She's a 'person of interest' in her parents' 2023 murder.

The woman accused of killing U.S. Border Agent David Maland allegedly used a gun bought by someone who was a person of interest in a double murder, prosecutors said.

A 21-year-old Washington state woman was arrested Friday for allegedly shooting a US Border Patrol agent to death in Vermont earlier in the week, according to federal authorities.

Associates of woman in Border Patrol agent's shooting death tied to other homicides in Pennsylvania and California.

A Washington state woman was ordered held without bail Thursday in connection with the death of a U.S. Border Patrol agent in Vermont.

Teresa Youngblut appeared in U.S. District Court in Burlington for a detention hearing following her initial appearance earlier this week. NBC5 was in the courtroom for Thursday's hearing.

Officials said the agent was shot on Interstate 91, which was closed for several hours near the border with Canada.