The Metro Nashville Police Department continues to review security video to try to determine what happened to 22-year-old Riley Strain, a senior at the University of Missouri.

Strain disappeared in Nashville last Friday night after being kicked out of Luke Bryan’s bar on Lower Broadway.

Strain was last seen on camera near the river while crossing 1st Avenue North at Gay Street around 9:47 p.m.

His phone was last tracked near Public Square Park along the Cumberland River.

The Tennessee Alcoholic Beverage Commission (TABC) opened an investigation to see if Luke Bryan’s bar violated state law by overserving Strain before removing him from the bar.

“State law prohibits serving alcoholic beverages to someone who is visibly intoxicated,” said a spokesperson from the TABC

Strain was caught on several security cameras stumbling — and sometimes falling — down the sidewalk. Instead of heading toward the hotel he had told his Delta Chi fraternity brothers he was going to, he walked in the opposite direction after they allowed him to leave the bar alone.

Strain’s fraternity brothers did not call 911 to report Strain missing for nearly 16 hours after he was last seen.