Elizabeth Duerson's attorney says she's been missing since Tuesday, May 13.
In December 2012, a 30th District Court jury found Elizabeth Duerson guilty of intoxication manslaughter for a January 2010 car accident that killed her brother.
Former Dallas Cowboys player Josh Brent was convicted of intoxication manslaughter Wednesday for a fiery wreck that killed his teammate and close friend Jerry Brown.
Charles Edwin Hill is charged with intoxication manslaughter.
An MSU graduate was killed Tuesday in a rollover accident in northwest Fort Worth.
Elizabeth Duerson entered a guilty plea to the charge of intoxication manslaughter.