Paddock is suspected of killing 58 people and injuring hundreds attending the Route 91 Harvest festival in Las Vegas on Oct. 1 before taking his own life.
Three months before the shooting, Paddock sent emails discussing buying bump stocks, which can make semiautomatic rifles fire hundreds of rounds a minute, the unsealed documents show. Bump stocks believed to be used in the massacre were found in the 32nd-floor hotel room from which Paddock fired.
The unsealed documents, however, do not provide a motive for the killings, the Los Angeles Times reports.
Paddock shot and killed himself before police arrived at his hotel room the night of the shootings.
In the days after the shootings, authorities called Danley a “person of interest.” Her attorney has said she had no inkling of Paddock’s plans.
Documents posted online by the Review-Journal showed that FBI agents sought information from Microsoft and Facebook regarding the accounts held by Paddock and Danley.
An unsealed search warrant shows that an email sent July 6, 2017, from an account linked to Paddock to an address that he may also have controlled, discusses the use of bump stocks “for a thrill,” according to an affidavit posted by the Las Vegas Review-Journal.
The emails also mentioned trying out an AR-style rifle before purchasing one.
The Los Angeles Times reported that investigators are not sure why Paddock would send emails between accounts he controlled, or whether one was controlled by another person, which would mean, “investigators need to determine who was communicating with him about weapons that were used in the attack,” one of the warrants said.