Authorities in Ohio have arrested and charged a former 'American Idol' contestant with shooting and killing his wife and staging the crime scene to mislead investigators. Caleb Flynn pleaded not guilty Friday to charges of murder, assault and tampering with evidence, per the Associated Press.RELATED: Former Prince Andrew Arrested On Suspicion Of Misconduct In Public Office Over Ties To Jeffrey EpsteinWhat Is The 'American Idol' Contestant Accused Of Doing?Caleb's wife, Ashley Flynn, was found dead Monday (Feb.