We now know how Whitney Houston died, but the investigation is not closed. Why not? What, if anything, are police considering as they continue their work on the case? Dr. Drew and his guests have something to say about that.

And outrage grows over the shooting of Trayvon Martin. The neighborhood guard who shot him did not violate the law according to police. Rallies are planned for the weekend.  Could public pressure force an arrest?

Dr. Drew wants to hear from you. Tell him what you think about tonight's show.

Watch HLN tonight and every weeknight at 9 on HLN

Prescription pill abuse is the number one cause of accidental or premature death in the United States. More people die from it than traffic accidents. Dr. Drew will devote a significant part of the show to the topic. And he wants to hear from you. He will be taking your calls and questions about this scourge that is killing our friends and loved ones. If you care about what's happening to those all around us and want to know what can be done to stop it, you must watch this show.

Rep. Mary Bono Mack is Dr. Drew's special guest.

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

Colorado mother of three, Paige Birgfeld, vanished five  years ago.  A hiker just found what was left of her body. Did her work as an escort lead to her death? Police are calling it a murder, but until they know how she died, there are more questions than answers in this sensational case.

Plus, how far is too far when disciplining children? A teen was forced to kneel for hours on end and drink "meat shakes" as punishment. Is this cruel? Appropriate? Productive? Harmful? Or something else?

And Dr. Drew will examine Oprah's interview with Whitney Houston's family. What do Bobbi Kristina's remarks, if anything, reveal?

As always Dr. Drew is taking your questions and calls!

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

Tom Arnold's sister, Lori, talked to Dr. Drew Wednesday night about her life as the “Queen of Meth”, an addict and felon.

Lori owned a 144-acre horse ranch, a big home, an airplane, and more.

She made $200,000 a week at the height of her drug-dealing enterprise … but spent most of the last 20 years in prison.

Hear her story in the video clip above.

Dr. Drew's take on Whitney Houston's life...and death. We don't know what killed her. But we know that she had addiction problems throughout her life. What role did they play in her demise? Who tried to step in and stop it? Were doctors who prescribed medication in any way culpable? Did the pitfalls of fame and fortune contribute?

Dr. Drew will bring his decades of experience as a physician and addictionologist to the discussion.

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

Why do so many celebrities seem to have addictions? Comedian and actor Adam Carolla, Dr. Drew and RadarOnline's Dylan Howard weigh in.

Arnold Schwarzenegger and Maria Shriver confirm they are separated.

Dr. Drew will talk about how turning points in both of their lives may have contributed to the marital stress. Plus, Drew will ask what this means for their children and their future as a couple. He will talk through various events in their past that could be clues into their separation and Dr. Drew will bring it home to many viewers who are going through parallel issues in their own marriages.

Then, it was just last week state officials in New Jersey began visiting gas stations and smoke shops to confiscate so-called “bath salts” from store shelves, after the state issued an order making the designer drugs illegal in New Jersey. Lawmakers moved quickly to ban bath salt sales after William Parisio, 22, murdered his girlfriend, Pamela Schmidt, while he was allegedly high on bath salts. The bath salt powder, which can be snorted, smoked or ingested can have effects similar to cocaine or methamphetamines. Users typically experience extreme agitation, paranoia and vivid hallucinations. During the show tonight, Dr. Drew talks to families whose lives were devastated by a loved one’s addiction to bath salts.

Catch it all tonight at 9 p.m. ET/PT on HLN!

They have the most dangerous jobs in the world, but it's addiction that threatened their lives.

Two "Deadliest Catch" crew members, Jake Harris and Jake Anderson, joined Dr. Drew on Tuesday’s show to talk all about their personal struggles.

Jake Harris had problems with OxyContin – Jake Anderson with alcohol. Both suffered the loss of their fathers while working stressful jobs on the high seas.

Dr. Drew asks the two how they handled their problems while at sea for weeks at a time.

Watch a clip from this segement above and then the full interview tonight at 9 p.m. ET/PT on HLN.