The word is out on what was actually taken from Michael Jackson's doctor's office during the big raid earlier this week.

When cops left Dr. Conrad Murray's Houston digs they had their hands full -- of drugs.

According to the Los Angeles Times this is what was taken: 27 tablets of phentermine, a prescription appetite suppressant; and one tablet of clonazepam, a muscle relaxant. Investigators also confiscated a computer, a Rolodex card with Federal Express information, and e-mails from one of Murray's former employees.

And the e-mails are what could do the doc in.

"The e-mails are key: What did Dr. Murray say to other people after Michael Jackson died? And was it he that ordered the drugs" that may have killed him,"  Loyola Law School professor Laurie Levenson told People.com. "The paperwork always wins these cases and the e-mails are critical."

Insiders are also whispering that cops already know what drugs killed Michael (even though the toxicology reports aren't officially in), and are now looking for the docs who supplied them -- hence the "manslaughter" term that's flying around.

"There's a lot of doctors we will see go down on this case," speculated a former LA prosecutor.

This case has become so far from uncomplicated.