Any idea how old it is or whether he had full disk encryption enabled? You might be able to get the files off at least if it wasn't. well, somebody might be able to...
Assuming you tried all these:https://support.apple.com/en-us/HT202860
Assuming you tried all these:https://support.apple.com/en-us/HT202860
2013 Cadillac ATS....¶▅c●▄███████||▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅||█~ ::~ :~ :►
2008 Chevy Malibu LT....▄██ ▲ █ █ ██▅▄▃▂
1986 Monte Carlo SS. ...███▲▲ █ █ ███████
1999 F250 SuperDuty...███████████████████►
1971 Monte Carlo SC ...◥☼▲⊙▲⊙▲⊙▲⊙▲⊙▲⊙▲⊙☼◤
2008 Chevy Malibu LT....▄██ ▲ █ █ ██▅▄▃▂
1986 Monte Carlo SS. ...███▲▲ █ █ ███████
1999 F250 SuperDuty...███████████████████►
1971 Monte Carlo SC ...◥☼▲⊙▲⊙▲⊙▲⊙▲⊙▲⊙▲⊙☼◤