April 9, 2012 11:46 am Police Investigate Potomac Shooting Montgomery County Police are investigating a shooting outside a Potomac home. NBC4’s Megan Mcgrath is in Potomac with the story. Local 1:27 1 dead, 4 hurt in Suitland crash 3:27 How the pulley system helps first responders make rescues 0:24 1 killed, 23 others hurt in Maryland party bus crash 1:05 Court docs reveal moments leading up to Dunbar High School shooting that hurt teen 2:29 George Washington University president says pro-Palestinian encampment is ‘unlawful'