When he was sentenced for killing three teenagers and gravely wounding another at a house party north of Seattle, Allen Ivanov said he was sorry and that he couldn't explain why he did it.
But he noted one factor that allowed him to carry out the shooting — “the ease of acquiring a gun.” The then-19-year-old bought the assault-style rifle a week earlier and was so unfamiliar with the weapon that he sat in his car outside the party and studied the owner's manual before opening fire on his ex-girlfriend and others.
