we begin with dorothy spencer live in baltimore. dorothy. >> doreen, it's obvious the gunman was extremely upset with his mother's doctor. what exactly set him off remains a mystery tonight. baltimore this morning, shot and wounded an ortpedic surgeon, shot and killed his mother, then took his own life. authorities say he became distraught while talking to dr. david cohen about his mother, 84-year-old jean davis. he pulled out a semi automatic gun and fired one shot. >> based on the initial assessment, thwounds appear to be survivable wounds. >> he barricaded himself inside his mother's room. police found them dead in an apparent murder/suicide. >> it came over the loud speaker we couldn't exit the children's center, and, of course, flashing all overhe news what was happening, so i was happyo be locked in with security guards outside the door. >> nobody coming in, nobody going out. we heard this emergency bell le, bonk, bonk, bonk. oh my gosh. what is going on? it was scary.xd >> it could have been a 9/11 thing. we ddn't know. >> rep