Daniel Rizzo, an ex-prosecutor who allegedly withheld exculpatory evidence that caused an innocent man to go to death row, is facing an attorney disciplinary complaint that’s similar to past grievances which stripped ex-prosecutors of their law licenses.

Rizzo, a retired Houston attorney, formerly worked as an assistant district attorney in Harris County. From 2003 to 2005 he was the lead prosecutor in the capital murder case of Alfred Dewayne Brown, who spent 12 years in prison for his wrongful conviction of murder. In May, a judge dismissed Brown’s case on the basis of actual innocence, in response to a detailed report by an appointed special prosecutor, John Raley.