The 21-year-old man arrested and charged with shooting and killing 10 people at a Boulder, Colorado, grocery store ranted about on Facebook over the past 18 months about "racist islamophobic people," then-President Donald Trump, and not having a girlfriend, the U.K.'s Daily Mail reported Tuesday.
Police identified Syrian-born Ahmad Al Aliwi Alissa of Arvada, Colorado, who came to the United States when he was 3, as the shooter in Monday's rampage. He was known to the FBI through his association with someone else who it had been investigating on an unrelated matter, multiple reports said.
Police have not released a motive, but the Daily Beast quoted his brother, 34-year-old Ali Aliwi Alissa, as saying his sibling was "paranoid." He said there was no political motive in the killings, "it's mental illness."
Ali Alissa claimed his brother was bullied in high school and became "anti-social."
Ahmad Alissa was engaged by police at least twice before, including one incident in 2017, when he punched a classmate, the Denver Post reported. Ahmad Alissa claimed the classmate called him "racial names" weeks earlier, but witnesses said they heard nothing.
He was convicted of misdemeanor assault in 2018.
According to the Daily Mail, Alissa wrote in a July 2019 Facebook post wrote: "Yeah if these racist Islamophobic people would stop hacking my phone and let me have a normal life I probably could."
He also railed about Trump's immigration policies.
The Post quoted former high school wrestling teammates as describing Alissa as having a quick temper, "violent," and "scary to be around."
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