Mehaniq/shutterstock.com Matthew Keirans met William Woods at a hotdog cart in the late 1980s, stole his identity, and lived as him for roughly three decades — pulling a six-figure salary as a hospital IT administrator, getting married (his wife didn't know his real name), and having a child who bore Woods's surname. When Keirans stole cars, warrants were issued in Woods's name. In August 2019, the real Woods — homeless by then — walked into a California bank to report that someone had stolen his identity. The bank called Keirans, who answered the security questions Keirans himself had set up. Police arrested Woods. Keirans told them he wanted to prosecute. A court found Woods incompetent to stand trial — he kept insisting his name was William Woods, not Matthew Keirans — and he was placed in a mental hospital and given psychotropic medication.…