When Miguel Herrera was badly hurt in a 2002 car crash, he didn’t have to look far for legal representation. Cherry Hill, N.J., lawyer Jeffrey Hark appeared one day in his hospital room. Herrera says that in pain and under heavy medication, he signed a contingency fee agreement.

It wasn’t until much later, Herrera says, that he learned of Hark’s conflict of interest: The other driver in the crash was Vernon Roth, Hark’s wife’s grandfather.