Police in California say they've arrested a man who appears to have devoted most of his waking hours for six months to making crank calls to 911. Maurice Cruz, 41, is accused of making 18,000 prank calls over the period—around 100 calls a day. He was arrested by California Highway Patrol and Secret Service investigators and charged with misusing 911 emergency lines to annoy or harass, the Los Angeles Times reports. The charge is punishable by a maximum of six months in jail, a $1,000 fine, or both. (More 911 stories.)