David Schoetz

A noose was left hanging from a tree limb near a black cultural studies center on an American college campus. That's the scenario that University of Maryland police, with help from the FBI, are investigating as a possible hate crime that may be tied to a similar racial controversy playing out in Louisiana.

A mentally disturbed woman in Arizona is facing murder charges after police say she broke into an elderly neighbor's apartment Sunday evening and fatally stabbed an 83-year-old woman -- less than an hour after she had been released from a psychiatric care facility. Scottsdale police say they had taken the women to a hospital for observation the previous week.

A court found that Virginia Tech killer Seung-Hui Cho was "mentally ill" and potentially dangerous. Then it let him go.