When Shawn Murphy's wife died in 2009 after a botched gallbladder surgery, he presumed the doctor who performed the operation would be forced out of medicine for good.

Dr. Pachavit Kasemsap, a former Air Force surgeon, had cut Loretta Murphy's aorta during that common procedure, according to a database of malpractice payments kept by Florida insurance regulators. She never left the hospital and died just shy of her 40th birthday. Shawn Murphy was left to raise their two daughters, then 13 and 17, on his own.

During the weeks that Murphy prayed for his wife to recover and the months that he fought Kasemsap in circuit court in Brevard County, Florida, he didn't know that other families had complained that their loved ones had suffered under the same doctor's care.