TO: Chief of Police, City of Dallas, Texas. Once you enter the name and date of birth, click the details button.You can also use the citation number to pull it up. Application Process: Mail to: Dallas County Sheriff's Dept. , 133 N. Riverfront Blvd. This is a temporary trainee classification used to qualify and train candidates' underfilling permanent Police Officer positions. In a letter to the President's Task Force on. This is a temporary trainee classification used to qualify and train candidates' under-filling permanent Police Officer positions.