Medical Malpractice Attorneys in Dallas, Texas. Experienced Medical Malpractice Law Firm Specializing in Personal Injury and Medical Negligence. If you've been the victim of medical malpractice, a defective medical device, or any other type of personal injury, turn to attorney Tommy Hastings. Our law firm has a reputation among the defense lawyers and insurance companies of tough, but fair and willing to stand behind our clients all the way through trial.