I think the problem the defense has that they can't overcome is that the state has proven him to be a completely dishonest person as evidenced by his many financial crimes against his clients and the accompanying lies he would have told to accomplish them. Then he admitted to lying to law enforcement from the beginning of the investigation. Now he says he's finally telling the truth. The only real evidence of his innocence is he denied the murders.
What I think is particularly disturbing about his financial crimes is he committed them, not to provide food and shelter to his family, but to live an incredibly lavish and entitled life style. For example he took his entire family, 4 to 6 people to the final four. How many tens of thousands of other peoples' money did that take. Likewise he took them to the Kentucky derby. In one photo with his wife and 2 children the males are wearing feathered bow ties to the tune of $200 each of other peoples' money. He apparently had housekeepers for both houses and hired a guy to take care of his dogs in the kennel. Now, all of that spending is fine if it's his money, but to steal from poor and ignorant clients to accomplish it is unforgivable. And for someone to think he is entitled to do that is a sociopath who will also kill his family if he feels its necessary. Two of the people I feel sorry for is his older brother Randy and his younger brother John Marvin. Randy's name was taken off a law firm that was known as the Murdaugh firm for over a 100 years and John Marvin sells tractors and has to live in a town where is name is the brunt of jokes. Pathetic!