The FBI and U.S. attorney's office in Las Vegas are not providing details about whether a federal grand jury is hearing evidence in a case spun off of the Oct. 1 mass shooting that became the deadliest in modern U.S. history.
Spokeswomen for both agencies declined comment Friday after Clark County Sheriff Joe Lombardo said the FBI was investigating "an individual of federal interest" other than the shooter, Stephen Paddock.
Lombardo also says a federal grand jury is hearing evidence in a case spun off from the Oct. 1 mass shooting.
Paddock killed himself after killing 58 people and injuring hundreds, and Lombardo said no criminal charges are being considered against Paddock's girlfriend, Marilou Danley.
The sheriff did not identify the person under federal investigation or say what charges the person might face.
Lombardo told reporters that all the guns Paddock amassed were legally obtained.
Officials looking at Paddock's internet search history, which included swat tactics and even child pornography. They also found searches for locations around Boston, including Fenway Park. Investigators believe he was looking for other places to commit violence.
The Associated Press contributed to this report.
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