Yeah, that's good and common way to do it. I found the Japan photo you mention from TB's FB page by Google photos of Tokyo, since that is the first stop in Japan for most Americans, and I looked for bridges that matched the river in that photo. This confirmed it was Tokyo since the shots looked almost identical. Less clear was that my Google comparison photo was an aerial (so shot from a plane or helicopter). Since I doubt took that TB shot an almost identical portion of this from a flight into / out of Tokyo, my guess is that TB never went to Japan.
Oh, and I'd guess he never graduated from WMU either. I'm not even sure he ever attended WSU. Do you know that? I read a few mainstream media reports, but I never saw any mention of TB going to college (only to high school). Was there something on that FB page that suggested WMU? I didn't see that.
If not, I will wonder about all the time TB spent playing fantasy games at the Lincoln Park library and probably in his and his friend's homes. That might have been a lot more time than most 30-year-olds do, if he never attended college at all or dropped out of college at a young age. It doesn't matter much, but I was just curious what could explain such vicious behavior.