MUNCIE, Ind. (AP): Muncie police are enlisting a national blood sports expert to help them crack down on local dog-fighting operations.

Terry Mills of the ASPCA led recent training for about 80 police and animal control officers about how to investigate and prosecute those who organize animal fights.

Mills says gambling and egos often drive people to engage in organized dog fights.

More than a dozen fighting dogs were found in a March 2012 raid of a condemned mobile home in Muncie. 38-year-old Rahsaan Ahmad Johnson was sentenced to a four-year prison term for 21 convictions stemming from the abuse and neglect of the pit bulls at his mobile home.

He's free while he appeals his convictions.