Not to make any speculations:  I once hired a replacement for this guy in a director position.  History of being very responsible with a director job he was in for at least 3-4 years with no incident, wife and 2 kids.  All of a sudden he goes missing for 10 days.  Missing persons report filed, etc.  
He shows up home 10 days later after a coke, drinking, and gambling binge in vegas.  
Odd but these things happen, often (from what I am told) why police are usually skeptical of adult guys who are reported as missing.  
Either way, I hope the guy the OP is talking about straightens out the events of what happened in the last 5 days, be it his fault or not.  Someone MIA for 5 days is usually traumatic for a lot of people no matter who is to blame.