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.

Jeffrey Michael Kelly was arrested Tuesday and charged with 10 counts including committing a terrorist act. The FBI was searching his home on Wednesday.

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.

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.

Arizona investigators surveilling the man accused of shooting at the Democratic National Committee office in a suburb of Phoenix saw him posting political signs with bags of a white, powdery substance attached,

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