Marcus Lamb is not sin-less! Neither is Eddie Long or any other preacher, pastor, evangelist, man, woman or human being on earth! There is only One individual Who ever walked the planet Who was totally and completely sin-less and I believe everyone who is reading this, knows Who that IS!
People of the world just don't understand that all of us are born with a sinful nature (satan's nature). That's the whole reason for being born-again, to receive the Divine nature (God's nature).
Becoming a Christian (a real Christian) doesn't turn everything into a sweet bed of roses or an exotic pleasure cruise, as a matter of fact, it becomes a struggle. Kinda like having a doberman and a pit bull inside of you, fighting all the time.
Now, if you were to ask me, "Which one wins?" Well, that's just to easy of a question to answer. "It's the one I feed!"
If Jesus said, "love your enemies, bless those who curse you, do good to those who hate you, and pray for those who spitefully use you and persecute you..." I wonder how much more we should pray for someone like Marcus Lamb?