Washington, DC Carolyn Mattingly and Andrew Racca dead in apparent murder-suicide that ends with garage on fire and car crashed into tree on Piney Meeting House Road in Potomac, MarylandAccident Date: Tue, 09/30/2014Montgomery County police confirmed that the two deaths that took place within minutes of each other in Potomac on September 30th are related. According to authorities, Andrew Racca and C.
