Nathan apparently wasn't reported missing until 2 days after he was last seen due to a communication misunderstanding. It sounded like someone was supposed to pick him up on the 12th but either didn't or did, and he hasn't been seen since.
Nathan resided with his father up until his passing and then Nathan moved in with a sister and brother-in-law. It appears he had some kind of supports while with his father, probably through a Community Living agency or something similiar. He may have also attended a Day Program of some type, however during Covid many of these extra supports were cancelled/terminated. He would have rec'd ODSP monthly (direct deposit most likely) and some passport (formerly SSAH) funding for extra activities and staffing. Upon moving to the sister's, his ODSP should have still continued along with whatever extra funding (Passport) he was entitled to as new funding year starts Apr 1st. IF the family was managing the funding, it should have been an easy transition- just a change of address. But, if an agency was handling it, then perhaps there was a lapse in transferring to another agency. Depending on his needs, his passport funding could be a substantial amount (between $5000 to $20000+ per year).
ETA- the money wouldn't be readily accessible- there are checks and balances for these funds.