THE Plymouth massacre gunman Jake Davison was active across several social media platforms and uploaded a video on YouTube just weeks before his deadly attack, saying he was “beaten down” and “defeated by life”.

Detectives are now examining the 22-year-old’s social media output as part of their investigation, Chief Constable Shaun Sawyer of Devon and Cornwall Police has confirmed.

Both his YouTube and Facebook accounts were removed by around lunchtime today, but a Reddit account believed to belong to Davison could still be accessed this afternoon.

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– What has YouTube said?

Google-owned YouTube has confirmed that Davison’s account had been terminated. The removal was carried out under its offline behaviour policy.

Rules on the platform prohibit inciting violence, including encouraging others to go to a particular place to commit violence or to perform violence at a particular time, the firm said.

Google also said it will comply with any police requests made through proper legal processes.

– What has Facebook said?

A spokesperson for Facebook – which also owns Instagram – confirmed it too has removed Davison’s accounts.

The social network said he was removed under its dangerous individuals and organisations policy, which does not allow mass murderers on either platform.

– What has Reddit said?

Reddit is yet to respond to calls for comment.

An account thought to belong to Davison remained active this afternoon.