I just want to know if there is anything that I can specifically reference online with regards to the following.
Employee is salaried. Employee worked overtime in a single week: over 30 hour shift followed by 20 hour shift where employee had 6 hours of sleep between shifts during "expected work hours".
Employee manual states that deviation from expected work hours requires PTO, and thus was forced to take PTO in order to sleep.
Apparently United States allows severe abuse of Salary employees as everyone knows, but I have a hard time imagining there isn't something that protects the employee from that.