(The Hill) A woman who called the FBI’s tip line in January to express concerns about the teenager now accused of killing 17 people at a South Florida high school last week said she was worried that he was “going to explode.”

The caller told authorities that she was concerned that Nikolas Cruz, 19, would “get into a school and just shoot the place up,” according to The Wall Street Journal, which reviewed a transcript of the Jan. 5 call.

“You know, it’s just so much,” the woman said. “I know he’s — he’s going to explode.”

The woman said she made the call because she wanted to maintain a “clear conscience” if Cruz decided to carry out such an act, the Journal reported.

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