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 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.

Authorities in Arizona say a man arrested in shootings targeting Democratic campaign offices near Phoenix had more than 120 guns and apparently had been plotting a mass casualty event.

Jeffrey Michael Kelly, 60, allegedly fired gunshots at the glass front door and a window of an Arizona Democrats' field office.

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 investigating a series of shootings a Democratic National Committee office in Arizona found more than 120 guns, 250,000 rounds of ammunition and a grenade launcher at the home of a suspect, according to the local attorney’s office.

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