It makes me wonder how many missing persons (reported and unreported) or other crime victims could have potentially been a previous victim, if BG has indeed committed prior crimes. If he's 30-50 years old, he could potentially have 20 years of victims left behind. With so little information, it would be hard to connect the dots and tie other cases together. If there was SA involved, we could likely narrow down victims to females. But Libby and Abby's ages make it hard to determine if he had a preference for young teens or just post-pubescent females. With Delphi being so close to Purdue and the sheer amount of SA that happens on college campuses (reported and unreported), he could potentially have victims there.
Of course, I'm making some huge leaps, but I do think I will do some searching today.
As noted by others, the wider bridge of his nose sticks out the most and it appears a bit crooked. Genetics maybe, but more likely that nose has been broken before. It looks like the bridge of my dad's nose and somewhat mine, both broken numerous times. Football, softball, basketball, a bike wreck, a car wreck, and several punches between the two. The hooded eyelids also and the slight puffiness under the lower lids. Something that hasn't been mentioned though, is his neck. I notice the slightly visible adam's apple, but it doesn't appear to be pointy. Whether that's actually true to witness accounts or not, I'm not sure, but it seems an odd thing to add if it wasn't.
I don't know how likely they are to report things to LE even if they did have information.