Celebrity | Michael Phelps What Michael Phelps Did Before His DUI Bust Went on an 8-hour 'gambling binge,' apparently By Evann Gastaldo Posted Oct 1, 2014 10:59 AM CDT Copied In this Aug. 20, 2014, file photo, U.S. swimmer Michael Phelps attends a press conference ahead of the Pan Pacific swimming championships in Gold Coast, Australia. (AP Photo/Rick Rycroft, File) What was Michael Phelps doing before he was arrested on DUI charges early yesterday? According to TMZ and its "casino sources," he was on an eight-hour "gambling binge." The sources say Phelps was playing blackjack and drinking beer in a private VIP room at Baltimore's Horseshoe Casino starting around 5pm Monday; he left around 1am was pulled over around 1:40am a few miles from the casino. He's said to be a regular there, usually playing poker; it's not clear whether he played other card games Monday. Phelps apologized on Twitter yesterday: "I understand the severity of my actions and take full responsibility," he wrote. "I know these words may not mean much right now but I am deeply sorry to everyone I have let down." Read These Next UPS driver hits the Slip 'N Slide with some partying teens. Kohberger agrees to plea deal in Idaho killings. After girl goes overboard on cruise, 'hero' dad to the rescue. Senate passes massive spending package. Report an error