FBI releases its records on Whitney Houston

Whitney Houston performs at the World Music Awards on Sept. 15, 2004, in Las Vegas. / Getty

The FBI has released its files on a trio of investigations the agency conducted on behalf of Whitney Houston.

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Whitney Houston 1963-2012

The records, which were released Monday, show the agency conducted one investigation into an alleged extortion attempt in 1992, but agents and prosecutors determined no crime occurred.

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Whitney Houston tribute concert

Agents also found no evidence of criminal threats to the Grammy-winning singer in fan mail that was sent to the FBI for investigation in 1988 and 1999.

The 128-page file covers the height of Houston's popularity but does not contain any new personal details.

Records on the FBI's extortion investigation in which Houston was interviewed at the New Jersey offices of her management company are heavily redacted.

Houston drowned in a hotel bathtub last year, on the eve of the 2012 Grammy Awards. She was 48.