Parsons has been dealing with knee injuries since his four-year $94.8 million contract with the Memphis Grizzlies, appearing in only 100 games in four-plus seasons over that stretch.
Parsons has only played in five games this season for the Hawks, who acquired him from the Grizzlies in a trade last summer.
“Chandler is having a difficult time accepting the consequences of the defendant’s reckless conduct on the roadway,” Morgan & Morgan said.