She was vomiting in the photo, that's pretty good evidence of that level of intoxication. The accused was also clearly recognisable[1] in the photo so it beggars belief that they could think there wasn't sufficient evidence.

[1] “because he is easily recognizable in a photograph showing him raping the victim while she is visibly ill… why the RCMP decided these photographs aren’t evidence of rape is beyond us.” http://www.salon.com/2013/04/12/anonymous_on_rehtaeh_parsons...