The U.S. Federal Bureau of Investigation has released previously classified files related to pop star Michael Jackson, who died earlier this year.
The more than 300 pages from FBI files describe seven cases, including the investigation of a man who threatened to kill Jackson.
The documents also cover how federal agents assisted California authorities in two cases involving allegations that Jackson abused children. The entertainer was later acquitted of all charges.
The files also say the FBI responded to a request by a U.S. customs agent to examine a videotape connected to Jackson to determine if the tape contained child pornography. It says forensic specialists responded by saying the tape was a poor quality third- or fourth-generation recording.
The investigation files do not contain any new information about the pop singer's sudden death.
Jackson died June 25 at the age of 50 from a lethal combination of drugs that included the powerful anesthetic propofol.
The Los Angeles coroner's office ruled his death a homicide. Jackson's personal doctor is under investigation but has not been charged.
Some information for this report was provided by AP.