But when there are commonalities among reliable witnesses, they must be considered. Both teachers were extremely precise in their descriptions. How many ACTUALLY SAW Cruz specifically? Was there shooting going on elsewhere? Lots of questions for the defense.
Maybe, but it also depends on the level of physical evidence obtained when they processed him after arrest as well as from the school. Did they find abandoned facemask and clothes and whose DNA is on it? Whose prints are on the rifle.
This school has security cameras everywhere, so if there are multiple shooters, they would have announced that and been looking for them also.
It’s easy to impeach an eyewitness as mistaken, but it is much harder to impeach physical evidence and video.