Officials said that, aside from Maland, one other person was killed in the altercation, while a third person was injured and was in custody. Those individuals were identified Friday as Felix Baukholt and Teresa Youngblut, respectively.

The FBI also said in an affidavit that officials recovered an arsenal of tactical equipment and weaponry from the scene, including two pistols, several magazines of ammunition, a ballistic helmet, two full-face respirators, two handheld two-way radios, and several electronic devices.

Here’s what we know about the two people involved in a fatal shootout with Border Patrol in Coventry, Vt.:

The FBI said that it took the 21-year-old Youngblut into custody. Youngblut, a Washington state resident, faces charges in US District Court in Burlington of assaulting and impeding a federal employee and using a firearm in a crime of violence, according to court records.

Youngblut was in the driver’s seat of the Prius at the time of the stop, according to court records, and allegedly drew and fired a handgun without warning toward the uniformed Border Patrol agents in the road. She was struck by gunfire and taken to Dartmouth-Hitchcock Medical Center in New Hampshire, where she is still receiving treatment.

Youngblut and her companion, Baukholt, apparently checked into a hotel in Lyndonville, Vt. on Jan. 14, according to court records. A hotel employee contacted police to report concerns about a man and woman wearing “all-black tactical style clothing with protective equipment,” the affidavit said.

Though Vermont is an open carry state, the employee reported that Youngblut had been “carrying an apparent firearm in an exposed-carry holster” as well, the filing said.

Vermont law enforcement tried to initiate a “consensual conversation” with the pair, but the two claimed to be in the area looking for real estate and “declined to have an extended conversation,” the affidavit said. Officials said that Youngblut was seen carrying a handgun during the interaction.

The FBI identified Baukholt as a German national. Officials said that Baukholt, in the passenger’s seat of the Prius, attempted to draw a firearm before “at least one Border Patrol Agent” fired at them. Baukholt was killed during the encounter, officials said.

Baukholt was the registered owner of the car, according to court records, and appeared to have an expired visa.

Earlier on the day of the shooting, law enforcement surveilled him and Youngblut at a Walmart in Newport, Vt., according to court records. Officials said that Baukholt entered the Walmart at approximately 1 p.m. and came out with two packages of aluminum foil, which he used to wrap “unidentifiable objects” while seated in the passenger seat.

After the gunfight, investigators found two packets of suspected cellphones wrapped in aluminum foil behind one of the Border Patrol vehicles, according to court records.

Material from previous Globe coverage was used.

Camilo Fonseca can be reached at camilo.fonseca@globe.com. Follow him on X @fonseca_esq and on Instagram @camilo_fonseca.reports. Travis Andersen can be reached at travis.andersen@globe.com. John R. Ellement can be reached at john.ellement@globe.com. Follow him @JREbosglobe.