The 22 year old Plymouth shooting suspect was a loner, with a fascination for guns, who regularly used social media to bemoan his inability to find love.
In a series of recent video posts on his YouTube channel, Jake Davison said that his life “amounted to nothing”.
He named one clip: “Lack of willpower drive and motivation when life beats you down.”
Following the shooting on Thursday evening, Devon and Cornwall Police Chief Constable Shaun Sawyer confirmed that Davison was a firearms licence holder.
Mr Sawyer added that “no motive” for the attack had been identified at present, saying: “We are not considering terrorism or a relationship with any far-right group.”
Davison’s YouTube account showed that he had liked several videos related to guns and had subscribed to channels with firearms content, including “God family and guns” and “The Gun Collective”.
On his Facebook profile, Davison, an apprentice crane operator, claims to be from Phoenix, Arizona.
He also shared a quote from former US President Donald Trump which read: “In America, we do not seek to impose our way of life on anyone but rather to let it shine as an example for everyone to watch.”
His channel subscribes to an account named Incel TV, which features content related to “involuntary celibacy”.
The online subculture involves men who express hostility and extreme resentment towards those who are sexually active, particularly women.
Although saying he did not “clarify” himself as an “incel”, Davison talked about “people similar to me have had nothing but themselves”.
In another clip, he discusses missing out on a teenage romance and refers to “Chads”, an incel community term for good-looking men who attract women.
“I missed out on so much as a teenager, I hope I can make up for it,” he tells his viewers.
“I’m not advocating this, but if I have to I might even try and use drugs to make up for it, maybe cocaine fuelled sex or something, maybe that can make up for that missed teenage experience.”
In another clip, he says: “I hate it when people say teenage love is overrated.. guys who are virgins until they are older think ‘we must think it’s like some romantic move or some teenage romance movie’. I don’t think of it like that.”
He said he seemed “fresher” as a teenager but that he was “numb and more fed up with life” as an adult.
He continues: “The reality is, love is for the young.. and I know I’m still somewhat young and I hope I can make up for it, but I have a feeling like I missed that boat and it’s never coming back.”
He also moans about getting older, saying: “What is there to look forward to? Getting f***ing uglier every passing year.
“There’s nothing really to look forward to as an adult, other than getting rich.”
In his last post on YouTube from Monday, Davison included the word “blackpilled,” which is an increasingly common online term associated with a set of beliefs around nihilism and fatalism.
Devon and Cornwall Constabulary’s chief constable confirmed his officers were now pouring through Davison’s social media accounts for any clues to what may have motivated his murderous rampage.
YouTube has confirmed that the account on their platform run by Davison has been terminated as it “violates our offline behaviour policy”.