Neither the Liangs nor their attorneys could be reached for comment.

WSJ: FDA Chemist Charged With Insider Trading

In the most profitable transaction, the Liangs allegedly traded ahead of a May 2009 announcement by Vanda Pharmaceuticals Inc. that its schizophrenia drug Fanapt had received FDA approval.

WSJ: FDA Chemist Charged With Insider Trading

The Liangs didn't think much about it.

CNN: Watch out for the 'free' stuff