Smith was pulled over in mid-May for speeding and was later arrested after refusing to take a breathalyzer and failing field sobriety tests. According to Gregg Rosenthal (NBC Sports), Smith's lawyer argued that Smith "struggled with the heel-to-toe walk of the field sobriety test because of all his previous surgeries."
Smith was sentenced to 90 days' suspended jail time and fined $350. The NFL's all-time sacks leader is expected to appeal the fine. The Buffalo News also notes his driver's license was also revoked for a year thanks to his refusal to take the breathalyzer. As Rosenthal mentions, this isn't Smith's first run-in with drinking problems; he's been arrested three times previously for DUI-related incidents, but until today had never been formally punished.
Less than one month from today, on August 8, Smith - along with Bills team owner Ralph C. Wilson, Jr. - will be inducted into the Pro Football Hall of Fame.