He thinks he's so persuasive, that he can convince the jury. Lucky Luciano tried that too. Didn't go well for him.
He's going get destroyed on cross.
Keep in mind Puff has only been locked up for a week and going through withdrawal after 15 years of hard partying and drugs so anything he says or decisions made should be taken with a grain of salt.
There's no way in hell he testifies and I expect he'll have his own version OJ's Dream Team soon with this lawyer silenced and sitting at the end of the table soon.