I’m assuming something is wrong on his personal life that makes him unable to become active here.
I hope you will still get the loan amount once he comes back. Supported the flag.
He probably pulled off an exit scam using the cover of a signature campaign. First he got a small loan from Dave, who trusted him based on the past deals. He then looks for a signature campaign, gets enrolled and then goes back to acquire an even bigger loan from Shasan who had initially refused to lend him. I think Shasan may have missed the fact that he already had another active loan.
With the ~ $650 in his addresses, there was no need for him to continue participating in the signature campaign to repay the loans, since his primary goal was probably to default. A silly move overall because that account could make him way more money if he was active in the forum and sig. Campaigns.