I took a rain soaked ride over to the church where this incident originated. Its not what you might expect... its not one large church in the center of a big parking lot. There are actually several church/school buildings scattered about on adjacent streets, etc.... each with its own smaller (in some cases, very small) parking lot. I'm not sure exactly which parking lot Ms Cook may have been in, but they all seemed to have signs present at the entrance to the lot. (Edit: With the exception of one.. what appears to be the 'main entrance'.). I did not take a pic of each individual sign, as they were all the same. The signs states: 'Private Property' at the top, 'Church Parking Only' in the middle and 'No Trespassing' at the bottom. A pic is attached.
I also noted that in one or two areas there were signs further back towards the buildings that said 'No Loitering' (and something else... that could have been 'no trespassing'). These appeared to be directed more towards a fenced area, then the parking lot.
I agree with the comments in the later part of this thread, that the mere presence of signs does nothing to justify the officer shooting Ms. Cook. It may give some insight into why she was stopped in the first place (key word 'may')... but I don't see a direct connection to 'trespassing' and 'deadly force'. And I really don't think anyone is trying to make that connection.
Going further with that thought process, and based on what has been previously posted.... even if she was in the parking lot behind the posted signs, I'm not convinced that constitutes 'trespassing' by itself.... as EVERY visitor or guest to the school, expected or not, would have to pass behind the 'no tresspassing' signs. For example, if I wanted to stop and inquire about enrolling my children, you'd have a hard time convincing me that I was 'trespassing' as soon as I parked into their lot.
Ultimately... I think its just another piece to a puzzle, that is still going to take a very long time to put together (and even then... it may not ever have all the pieces).