As I am aware of this since I work in Howard County with this said they still have the mall closed as of yesterday and yes this was a domestic, the shooter took a cab to the mall, assembled the Remington 870 from his back pack by the food court bathroom, was seen walking upstairs to Zumies store and shot the 2 store employees, one which was his ex and the other she was engaged to. They plan on opening the mall no later than tuesday and investigation still ongoing, these apparent "signs" are placed just on entrance doors and it appears everyone adheres to them (joking) the "signs" are the worst thing. Also seems like Maryland new gun laws are working cause they said he purchased the shotgun in December from another county other than Howard cause he lived in College Park which is Prince Georges County, i think they said he purchased it in Montgomery County but don't quote me!!