FBI: 24-year-old gunman in Ohio rampage was obsessed with violence

NEW YORK - The gunman who killed his sister and eight other people in Dayton, Ohio, before he was slain by police had a history of violent obsessions and previously mused about committing mass murder, an FBI official said on Tuesday.

FBI agent Todd Wickerham told a news conference two days after the massacre in the streets of Dayton's historic downtown Oregon District that investigators have yet to conclude what motivated the killer or whether he may have had an accomplice.

Police said in the initial aftermath of Sunday morning's bloodshed they believed the slain suspect, identified as 24-year-old Connor Betts, a white man from the Dayton suburb of Bellbrook, had acted alone.