An Ottumwa man has been arrested after a month-long investigation about sexually exploiting children. In March, Ottumwa Police got a tip about a sexual exploitation case in the area.  On April 15, a search warrant was issued at a home in the 200 block of Hill Avenue.  On Monday (4/26), 21-year-old Juan Sales Barriga was arrested and charged with 76 counts of possessing child pornography and sexual exploitation of a minor.  Sales Barriga is currently free on bond.