Me too. My sister was about 13 when her illness began to manifest, although looking back, we do believe the schizophrenia was always present. Even now at age 40, she is severely ill , on the streets, and rarely comes home anymore, and when she does, she doesn't remember us very well, and usually thinks we are imposters.
I would lean more into him being sick than having been trafficked, but no contact, and he's still in the same city he went missing from gives me pause. In this condition, he would have had contact with police and outreach groups if he was on the streets, at some point, someone would know him...
But if he was claiming to be Julio...gosh i just don't know