Subscribe to Taste of Country on Youtube Now that a preliminary autopsy for Riley Strain is complete, police have evidence to support a theory about what happened to the 22-year-old. More testing and a full toxicology report will need to be finished before authorities can be certain about what caused him to fall into Nashville’s Cumberland River on March 8. The preliminary autopsy changed very little. Riley Strain’s body was found in the Cumberland River on Friday (March 22).The location of his body was eight miles downstream from where he was last seen.He’d been asked to leave Luke Bryan‘s Lu…