A life sentence in prison has not prevented leader Warren Jeffs from controlling the men, women, and children of the FLDS. He was locked up for sexually assaulting two underage girls, yet he still he wields considerable power. How, and why, is this being allowed to happen? Dr. Drew and his guests examine how control, influence and fear infects - and destroys - lives. If prison can't stop Jeffs, what can?

Plus, defending your life. Can you get away with murder, if you are protecting yourself? Dr. Drew looks at two recent cases that might have you asking what you'd do!

Watch Dr. Drew tonight and every weeknight at 9 on HLN.

On Tuesday night, Dr. Drew talked to the medical examiner who rocked the Casey Anthony trial with her revealing testimony about Caylee Anthony.

“Dr. G., is it your opinion that Casey got away with murder?” Dr. Drew asked Dr. Jan Garavaglia at the opening of the interview.

“That`s not my call, Dr. Drew.” Dr. Garavaglia responded. “My call is to state what happened and to state my opinion on the manner. And I still feel very strongly that this is a homicide.”

Dr. Drew mentioned how lead prosecutor Jeff Ashton had argued vigorously that the duct tape was an indication of the means of death. “Was that something you adhered to?” Dr. Drew asked.

Dr. Garavaglia responded, “it certainly could be. I never stated it wasn`t. The problem is, I couldn`t say scientifically that it was definitively over the nose; over the nostrils. It certainly could have been. But I couldn`t really defend that. But we certainly see homicide victims with tape over just the mouth to keep them quiet. So, I just didn`t feel like that was scientifically defensible. And there was probably other things going on with this little girl to cause her death besides just the tape.”

Dr. Drew interjected, asking what she was speculating during that time.

“Oh, now, people don`t understand that just because we didn`t find chloroform and because we didn`t find drugs in her bones, does not mean that they were not there,” she explained. “I think there was some indication that that was a real possibility. Certainly, she`s in a plastic bag. She could have been in the trunk. There`s some indication of that. So, there are a lot of different possibilities. I just couldn`t say for sure how that all fit together. But, clearly, we can say that the pieces fit together as a homicide.”

Dr. Drew later asked what her response was to those who criticized her for not opening Caylee’s skull.

“It was not needed," she said. “It wasn`t needed there then. You know, that was an anthropologic exam. You know, I have never done an autopsy where I haven`t opened the calveria to take the brain out to look inside. These were completely disarticulated, completely dry bones. And I had two very prominent forensic anthropologists working every moment with me on those bones. And we never - none of us felt that that needed to be done.”

Hear more from Dr. G and lead prosecutor Jeff Ashton in the video clip above.

You can watch more of Dr. Drew weeknights at 9 p.m. ET/PT on HLN and follow the show on Twitter @DrDrewHLN.

With the 2012 political season upon us, HLN’s Dr. Drew said Tuesday night that he wanted to take a different approach to politics ... by not discussing policy.

“I want to talk about who the candidates are and what you are and are not looking for in a presidential candidate,” he explained.

Dr. Drew asked political analyst Keli Goff if there was really anybody we can trust to do the job.

“Well, as the great philosopher Judge Judy has often said of teenagers, ‘how do you know when they`re telling a lie … their mouths are moving,’” Goff stated. "That`s sort of the case with politicians, unfortunately. I don`t even think it`s malicious or intentional at all times, but it`s impossible to make a pledge, like, there will be no new taxes, because the president has very little control over certain things like that because there`s this little body of government known as Congress that you have to work with on a bunch of things.”

Goff also mentioned how remaining truthful plays a very important role as well.

“Are you honest with your family?” she asked. “Are you honest with your wife? Are you a hypocrite? Things like that do ultimately matter to voters ... voters don`t expect a politician to be perfect, but they also don`t expect them to be hypocritical.”

Dr. Drew later said to his panel, “to some of this, you`re telling me a little bit about them as a person – a little bit about them as a thinker. I think we really do want to be led by somebody that`s a good, complete person, that is a good husband and good father."

Watch more of Dr. Drew weeknights at 9 p.m. ET/PT on HLN and follow the show on Twitter @DrDrewHLN.