This post is part of a feature in which he wonder whatever happened to some notorious financial felons. See all 17.

Mike Milken turned the market for bonds issued by less creditworthy companies into a gold mine for himself and his firm, Drexel Burnham. As I posted, this did not end well. But in the past several years, Milken has worked hard to rehabiliate his reputation -- putting money into prostate cancer research and talking about the economy.

Who is Milken and how did he get here? Mike Milken was an academic star. He used to take the bus back and forth to classes at Wharton and came in to school before dawn with a miner's hat on his head because the bright light helped him read annual reports. Milken and I studied with the same management professor at Wharton.

That professor predicted that Milken would either make a huge amount of money or go to jail. He did both -- eventually agreeing to pay $650 million in fines and plead nolo contendere to six felonies -- three counts of stock parking and three counts of stock manipulation. Milken went to jail from March 1991 until January 1993. But that's ancient history. Where is he now?

This post is part of a feature in which we wonder whatever happened to some notorious financial felons. See all 17.

Ah, for the simple days of the 1980s. Way back then, the crimes of greedy traders were obvious and unambiguous, and the crooks had the decency to look the part. Few played the role of the greedy financier as well as Ivan Boesky, who went all the way from immigrant's son to millionaire investor to disgraced jailbird. I only wish our current financial crooks played their parts as well.

Ivan Frederick Boesky rose to fame and fortune taking huge positions in companies that were soon to be taken over. He was quite successful during the merger mania that drove the 1980s boom market, and by 1986 he was worth over $200 million, which was real money back before hedge funds took over the world. The only problem was that he was trading on inside information, which while enormously profitable has the distinct disadvantage of being completely illegal.

Boesky was not subtle in his approach, often buying tens of thousands of shares in a company at a premium just days before the company announced a takeover. The share price would jump and Boesky would quickly cash out. The typically somnambulant SEC eventually took notice, and Boesky was caught red-handed in 1986 and charged with stock manipulation and insider trading. He paid a fine of $100 million and spent nearly two years in the (minimum security) slammer. He also sang like a bird to the SEC, providing enough information about crooked dealings on Wall Street to almost single-handedly bring the 1980s boom to an end.

This post is part of a series on some of the most memorable companies that have disappeared.

Drexel Burnham Lambert (1935 - 1990) spent its last decade accumulating money and power. The key was junk bond impresario Mike Milken, who used to take the bus back and forth to classes at Wharton and came in to school before dawn with a miner's hat on his head whose bright light helped him read annual reports.

Drexel's driving force, Milken, realized the potential of our shared management professor at Wharton. That professor predicted that Milken would either make a huge amount of money or go to jail. He did both. Milken made money by selling junk bonds to takeover artists who threatened companies by buying up their shares and proposing to throw out their managers. In many cases the companies bought out the takeover artist's shares at a premium to make them go away.

Milken was feared by the business establishment, and he had a contempt for the law. So he did himself in -- eventually agreeing to pay $650 million in fines and plead nolo contendere to six felonies -- three counts of stock parking and three counts of stock manipulation. Milken went to jail from March 1991 until January 1993. Drexel hemorrhaged capital; fired 5,000 people; and eventually filed for bankruptcy in 1990.

The lesson? If you can't achieve wealth within the law, you will pay the price.

Peter Cohan is President of Peter S. Cohan & Associates. He also teaches management at Babson College and edits The Cohan Letter.

Let us know in the comments what you remember about Drexel. And be sure to check out other Companies That Have Vanished.

If you want to get Patrick Byrne's take on naked short selling and the alleged conspiracy (involving class-action lawyers, hedge funds, and journalists) against his company, Overstock.com (NASDAQ: OSTK), then Deep Capture, the Movie is a good place to get it.

In the 45th slide of the presentation, to provide evidence of the journalistic conspiracy, Mr. Byrne plays a clip of former New York Post business editor Dan Colarusso speaking to Herb Greenberg, Joe Nocera, and Dave Kansas: "When I think of Patrick Byrne ... We have barrels of ink and stacks of money and all the resources in the world at our disposal, legal and, indeed our media, to crush him."

Is this indicative of a conspiracy? Speaking on Mad Money with Jim Cramer about Mr. Byrne, Herb Greenberg said that "the real conspiracy, if there's a conspiracy, is a conspiracy by these people to silence the critics."

Exactly. And here's a tip for Mr. Byrne: Journalists tend to be big believers in free speech. When you attack their ethics, attempt to intimidate them into silence, and an employee of your company sets up a website to smear them -- that angers journalists, and they jump to each others' defense.

Was there a conspiracy of journalists against Patrick Byrne? I seriously doubt it. But Byrne's efforts to silence his critics have made him an enemy of journalists and lovers of the First Amendment everywhere. Maybe that's the conspiracy.