Martin Welker was a patient for an impotence cream trial, until Welker was arrested for attempted rape. Placing responsibility on the cream, Welker sued the hospital and the company.
When the presiding doctor, Max Kleberg, was murdered and his wife Peyton was raped. Welker was a suspect when his record and lawsuit were found, especially since Peyton's jewelry was stolen in the burglary. Welker revealed he didn't know about the jewelry and he didnt sue Max directly because he himself was broke, clearing Welker of suspicion. (SVU: "Tangled")