Police have arrested a man suspected of shooting up a Democratic Party office in Tempe on three different occasions. Here's what to know:

Jeffrey Michael Kelly, 60, was also arrested on suspicion of leaving white powder on political signs in Ahwatukee, according to Tempe police.

In less than two weeks, Arizonans and the nation will decide the next president of the United States, but concerns about political violence leading up to and after Election Day has experts concerned,

An Arizona prosecutor said the man arrested in the shooting of a Democratic National Committee office in suburban Phoenix had more than 120 guns and over 250,000 rounds of ammunition in his home, leading law enforcement to believe he may have been planning a mass casualty event.

The man arrested in connection to a shooting at the Democratic National Committee’s (DNC) field office in Tempe, Ariz., may have been planning a mass casualty event, Maricopa County prosecutor

An Arizona prosecutor says the man arrested in the three-time shooting of a Democratic campaign office had more than 120 guns and over 250,000 rounds of ammunition in his home.

Authorities say they seized more than 120 guns from the home of a man accused of firing gunshots, on multiple occasions, at Phoenix-area campaign offices used by Democrats.

Police found a huge stash of guns and ammunition in his home, leading prosecutors to believe he was was planning a "mass casualty" event.

Officials seize more than 200 guns from home of Arizona man arrested in Democratic office shooting.