I know nothing about photography and have a question I hope a camera person can answer. Can you tell if pictures were taken from different cameras and different quality cameras? There are pictures that look very polished and profession, portraits, and then there are poor quality photos, blurry, etc that look like they would only be interesting to Alcala (as a memento?) such as the girl walking around with ashtray, the girl in yellow bikini dancing, and the girls with headphones listening to music. I'm trying to narrow down for myself the ones that are more likely to be victims than others before spending a lot of time on them.