In the first 48 hours after Devin Kelley opened fire at a church in Sutherland Springs, Texas, killing 26 people, neither the FBI nor other law enforcement agencies asked for Apple's help in unlocking Kelley's iPhone or linked accounts — possibly missing a critical opportunity, according to one report.

If the iPhone had Touch ID enabled, investigators could have used Kelley's fingers to unlock the device, Reuters said on Wednesday. Investigators have officially refused to identify Kelley's phone, but sources for the Washington Post have claimed it's an iPhone.

Touch ID normally forces users to enter their passcode after 48 hours if they haven't unlocked a device in the interim. Trying to brute-force a passcode lock risks the device self-erasing after too many failed attempts.

In a statement to BuzzFeed's John Paczkowski, Apple said that it "immediately reached out to the FBI" after learning about the seized phone from a Tuesday press conference. At the time the head of the FBI's San Antonio office, Christopher Combs, complained that encryption was making it impossible to break into the phone.

"We offered assistance and said we would expedite our response to any legal process they send us," Apple continued.