The acting inspector general of the Department of Homeland Security flouted nepotism rules by employing his wife, and took multiple jaunts, at taxpayers’ expense, to Florida, according to documents obtained by The Post. The documents show at least four trips that Charles Edwards — the acting inspector general assigned to root out fraud in the agency’s $40 billion budget — took from DC to Miami and Fort Lauderdale, where he was earning a computer and information-sciences degree at Nova Southeastern University, in 2011 and 2012. Travel receipts submitted by Edwards list the university’s name next to the rate charged by...