‘American Idol’ contestant’s murder case sent cops underground with high-powered magnet to find gun

Former "American Idol" contestant Caleb Flynn's missing handgun sent investigators into storm drains with a high-powered magnet, underneath vehicles and through attic insulation as they searched for the weapon prosecutors allege he used to kill his wife.

Despite the extensive search, investigators never found the gun, a Tipp City detective testified Monday during Flynn's murder trial in Ohio.

Flynn is accused of fatally shooting his wife, Ashley Flynn, inside the couple's home on Feb.