Not Showing Up For Funeral
Just her not showing up for the funeral would send off all kinds of alarm bells. First her story has plenty of grey areas. Someone will ask her where she was. Her phone will place her at the home where she placed the call. Plus, the shooting and the placement of bodies would be looked at a lot harder with a cop being shot. He shot fist, so it would have to be the perfect body placement for the bad guy to have returned fire and kill the officer. Especially the way the angels will be measured. The bad guy was on the floor so was the bullet entries will have to match that.
The position of the bad guy to be standing where she shoots the cop might be the wrong position the scene is calling for to make her story right for a double shooting homicide. Her act is hard to create so fast and to get it perfect, it would be almost a miracle to pull it off.