From the Washington Post, courtesy of Reuters:
Senate Majority Leader Bill Frist has been subpoenaed to turn over personal records in an investigation into possible insider trading, The Washington Post reported on Thursday.
[snip]
Authorities are looking into Frist's recent sale of shares of hospital operator HCA Inc., co-founded by Frist's father and brother. The sales took place just days before HCA's stock price fell on a disappointing July 13 profit outlook.
The newspaper, citing sources who spoke on condition of anonymity, said Frist was expected to testify under oath about what he knew about HCA's financial standing in the weeks before the stock sales.
Oh, testify, Bill! Do testify!