Former Meta engineer resumes testimony in landmark trial over social media's harm to young users

Bejar, who helped run surveys of teen experiences as part of a team examining well-being on Instagram between 2019 and 2021, said he flagged concerns about the platform's impact on young users to Meta leadership.

Bejar said Meta's internal surveillance was flawed because it focused on the prevalence of content that violated company policies, not how much harm it caused.

He read jurors an email he had sent to Meta's chief product officer Chris Cox, highlighting a supposedly substantial gap between the prevalence that Meta reported and actual harm that users reported.

"Young people were experiencing harm at extraordinarily high rates," he said. "A parent would have wanted to have known" that reality, he said.