Who is Vance Luther Boelter, the man wanted in the 'assassination' of a Minnesota lawmaker?

At various times, Vance Luther Boelter has claimed to work in the food service industry. In other moments, he's claimed he runs large firms involved with “security situations” overseas, including Africa, Eastern Europe and the Middle East.

His past is as mysterious as his whereabouts. The FBI is offering a reward of up to $50,000 for information leading to the arrest and conviction of Boelter, now the subject of an intense manhunt as the prime suspect in the assassination of a Minnesota lawmaker, the murder of another person and the shootings of two others.

Minnesota authorites say they believe it was Boelter who impersonated law enforcement to gain access to the victims' homes, exchanged gunfire with police and fled on foot outside Minneapolis.

David Carlson, 59, told Reuters that he has been sharing a house in Minneapolis with Boelter for a little more than a year and last saw him on Friday night. Then about 6 a.m. on Saturday, he received a text from Boelter.

"He said that he might be dead soon," said Carlson, who called police.

Carlson, who has known Boelter since fourth grade, said Boelter worked for an eye donation center and stayed at the house because it was close to his job. Carlson said he feels betrayed by Boelter and heartbroken for the victims, adding: "His family has got to suffer through this."

The cryptic message sent to his roommate is just one of many unanswered questions surrounding Boelter. Officials have described the attacks as a politically motivated assassination.

Boelter, who is considered armed and dangerous, is being sought by authorities following the “targeted shootings” at lawmakers' homes in Brooklyn Park and Champlin, two neighboring suburban cities. The shootings killed state Rep. Melissa Hortman and her husband, Mark, while wounding State Sen. John Hoffman and his wife, Yvette. Both lawmakers are members of the Democratic-Farmer-Labor Party.

Brooklyn Park Police Chief Mark Bruley said the suspect exchanged gunfire with police and fled on foot outside of Minneapolis. Bruley added that the suspect also had an SUV that is identical to real police vehicles, as well as an official-looking vest, outfit and equipment.