circulation. >>> the death of mark madoff officially ruled a suicide, the son of ponzi scheme operator bernard madoff hanged himself. his body was discovered saturday, the second anniversary of his father's arrest and the worst investment fraud in u.s. history. manuel gallegus reports. >> reporter: mark madoff could never shake so many people's suspicion he must have been involved or at least known about his father's elaborate ponzi scheme. the medical examiner confirmed the 46-year-old did take his own life. madoff's father-in-law discovered him hanging from a dog leash in his posh apartment as his 2-year-old son slept in another room and his wife was away at disney world with their daughter. a lawyer for his mother, ruth, said simply, ruth is heartbroken. there's been no public reaction from bernie madoff, currently serving a 150-year sentence in a federal prison in north carolina. >> i have no comment. i'm sorry, i can't help you. >> reporter: since the scandal broke, the pressure...