A California cop who was heralded as “Detective of the Year” just three years ago has been charged with sending sexually explicit messages to someone he thought was a teenage girl, authorities said. Santa Ana Police Detective Gregory Daniel Beaumarchais, 43, is facing a misdemeanor charge of annoying or molesting a victim believed to be under the age of 18, Orange County District Attorney Todd Spitzer said. “Police officers are entrusted with the sacred responsibility to safeguard society from harm,” the prosecutor said in a statement. “It is beyond disturbing that a sworn police officer would engage in inappropriate conversations...