FBI finds hundreds of weapons at home of suspect in Arizona Democratic Party office shooting

The reason it fits this sub, is they already knew this guy was an extremist committing crimes 2 years, long before he started shooting up Dem offices.

The cops just felt it wasnt in the interest of their personal safety to stop him, which lead to him escalating his crimes over the years.

Despite evidence pointing to Kelly as the perpetrator, Weich said law enforcement did not move to arrest him. Weich said that Phoenix police feared that approaching Kelly would pose a threat to their safety. A prosecutor out of the Phoenix City Attorney’s Office declined to pursue charges, Weich said.

Which lead to this:

Kelly was arrested about 1:30 p.m. on Tuesday during a traffic stop. Kelly's attorney Squires said his vehicle was stopped using a grappler that hooked the car from behind. "That is quite shocking to a person who's never had any previous allegations at all," Squires said in court.

Squires said in court the car was then surrounded by more than a dozen law enforcement personnel.

The prosecutor said Kelly had numerous guns in his car, including a machine gun. He did not have his cellphone. Similarly, no cellphone was tracked behind during the shootings at the Democratic office, the prosecutor said. That led authorities to believe he was on his way to "potentially do something," the prosecutor said.