George Zimmerman, wearing a bullet proof vest, walked out of a Florida jail shortly after midnight today and slipped back into hiding where his lawyer says he will likely stay until his trial next year. Zimmerman was able to leave jail after posting $150,000 bond as he awaits trial on a second degree murder charge for the shooting death of 17-year-old Trayvon Martin. Later today, Sanford Police Chief Bill Lee will officially resign, ABC News has learned exclusively. Lee, who had been "temporarily suspended" last month in the wake of the killing, is expected to make it official at 4 p.m.

Republican presidential candidate Rick Santorum has been causing a stir during his primary appearances because of his "sweater vests."

Police are investigating after a "malicious communication" - reportedly containing a bullet - was sent to Queens Park Rangers' training ground.

Bullet follows laser beam to target, has tiny fins to refine course.

US researchers are developing a bullet that guides itself to a laser-illuminated target. But an expert is concerned it may be sold to the public.