An Erie County Sheriff's helicopter searches at the scene of a shooting at Erie Count Medical Center in Buffalo, N.Y., Wednesday, June 13, 2012.  A police official confirms that a woman was killed Wednesday morning on the grounds of the Erie County Medical Center, which he describes as being in &quot;complete lockdown&quot; as SWAT teams and other officers cordon off the 65-acre campus. (AP Photo/David Duprey)