The 21-year-old gunman, a lieutenant in the Saudi air force, was armed with a lawfully purchased Glock 9mm handgun, and is reported to have posted a manifesto on Twitter before the shooting, denouncing America as "a nation of evil".
A number of Saudi students at the Pensacola base had been confined to quarters while the FBI investigated the shooting as a terror attack, CNN said.
Alshamrani, who was killed by a sheriff's deputy during the rampage at a classroom building, was undergoing flight training at Pensacola, where members of foreign militaries routinely receive instruction. Back in 2016, when Trump was still campaigning for the presidency, he called on his supporters to boycott Apple until it helped federal investigators access a seperate iPhone belonging to the San Bernardino shooter, Syed Farook.
DOJ officials said they need access to Alshamrani's phones to see messages from encrypted apps, noting also that such intelligence might help them determine if Alshamrani was planning attacks with other people. Barr said on Monday that Apple did not provide "substantial help" to unlock the suspect's two iPhones.
In response, Apple said in a statement that it's offered investigators a variety of information since the attack, including iCloud backups, account information and transactional data for multiple accounts in response to six legal requests. Apple responded strongly and in a statement said, "We reject the characterization that Apple has not provided substantive assistance in the Pensacola investigation".
Apple has not responded to our request for comment.
"The evidence shows that the shooter was motivated by jihadist ideology", Barr said, citing a cryptic message Alshamrani posted on 2019's anniversary of the September 11 attacks.
Still, US government officials, including Trump's Attorney General William Barr, have complained that Apple isn't doing enough to help unlock the iPhones of the Florida attacker. Apple cites the protection of personal information as the reason.