A Sigourney man is accused of trying to entice a minor that he thought was a 13-year-old girl.  According to court records, 28-year-old David Mark Stocks was using Facebook Messenger to communicate with the 13-year-old.  It turns out that 13-year-old was actually an undercover police officer.   Court records say Stocks agreed to meet with the 13-year-old for sex and drove 34 miles to meet with the minor.