Riley Strain's mom reveals he text her saying a rum and coke he ordered from ... trends now

Riley Strain's mom has said her son text her to tell her his drink tasted strange hours before he disappeared.

Michelle Whiteid said Strain, 22, had ordered a rum and coke that 'didn't taste good' on the night he vanished, NewsNation reports.

The University of Missouri student's half naked body was plucked from the Cumberland River in Tennessee 14 days after he vanished, but an initial autopsy ruled out foul play.

Now his mom has shared her fears his drink may have contained something which could explain the circumstances.

'Maybe there was something in it that shouldn't have been,' Whiteid said, explaining that her son told her the drink 'tasted like barbecue'.

'I go, 'Well, that sounds awful,' Whiteid added. 'He said, 'Well, it sounds good, but it's not.''

 Luke's 32 Bridge Food + Drink where Strain was last seen alive in person said he was asked to leave after being served one alcoholic drink and two waters.

The Delta Chi fraternity member was in Tennessee on a group trip for their annual spring formal when he was kicked out of the bar around 10 p.m.

Surveillance video showed him falling as he walked the streets of Nashville before his disappearance on March 8.

Additional surveillance footage released by the Nashville police show him wobbling and appearing confused as he crossed a closed road near the water.

The next morning, his fraternity brothers tried to find Strain using his Snapchat location but were unsuccessful and called police to report him missing.

Whiteid said her son had been 'excited' for the trip, but her world came crashing down when she received a call from his friends informing him they could not find him.