Boss who hired also fired? Back it up anyway to defend against discrimination claims

Employers are often advised to have the same managers who hired an employee also make the termination decision. The idea is that doing so may scuttle a discrimination lawsuit because it’s illogical for a manager to hire a member of a protected class and then turn around and fire him because of bias against that protected class. Don’t use it as an excuse to get sloppy with record-keeping and documentation.