Smith surrendered at the Champaign County sheriff's office Wednesday afternoon. He was processed and released after posting 10 percent of a $10,000 bond set on Tuesday by Judge Tom Difanis, authorities said.
Defense attorney Mark D. Lipton said earlier Wednesday that Smith, 19, planned to plead not guilty to the charges and would request a jury trial.
"Jamar and I are confident that this matter can be appropriately resolved in due course," Lipton said in a written statement.
Smith, a sophomore guard, was driving a Lexus in snowy conditions on Feb. 12 when the car struck a tree.
Authorities say Smith and his passenger, teammate Brian Carlwell, had been drinking tequila and beer before the crash.
Authorities say Smith, who allegedly believed Carlwell was dead, left the accident scene and drove back to his apartment. Bystanders saw the damaged car with an unconscious Carlwell inside and called police.
The accident left Carlwell, 19, hospitalized with a severe concussion. It also cost Smith the rest of the season; basketball Coach Bruce Weber said Smith agreed to sit out the remainder of the year.
Carlwell spent four days at Carle Foundation Hospital in Urbana being treated for a severe concussion. The freshman center was released from the hospital on Friday and could play again late this season.
Smith, who is too young to drink, had a blood-alcohol level of .176 percent, more than twice the legal limit of .08, authorities said. He was treated at the same hospital as Carlwell for a minor concussion and released early the next morning.
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