Nice neat lettering for a spray paint job--caps with lower case, lined up straight. Looks like work calmly done by a woman. An angry man would have scrawled at angles in caps.
I saw that and thought the same thing. It was obviously done at leisure (probably the first thing done in the staging). During a violent crime, this would have been sprawled and very sloppy.
I cannot imagine that we see this and the police don’t. I imagine they are already beginning to grill her.