QAnon was built upon Pizzagate, the 2016 conspiracy theory that led a gunman to a Washington, DC, pizza shop because he falsely believed it was a front for a child sex trafficking ring.
The FBI said an Arizona man trespassed on property and poured out water tanks meant for migrants in 2018 and 2019 because he "alleged a law enforcement cover-up" of child sex trafficking.
With an armored truck and ammunition, a Nevada man blocked traffic on a major bridge connecting Arizona and Nevada near the Hoover Dam in June 2018.
Blinded by QAnon, a 24-year-old killed a mob boss in Staten Island in March 2019 because he thought President Trump wanted him to, his lawyer said.
In April, an Illinois woman live-streamed her drive to New York in an effort to "take out" Joe Biden. Police said she had more than a dozen knives in her car.
Prosecutors in Seattle said a 26-year-old man who believed in QAnon killed his brother with a sword because he thought he was a lizard.
A Colorado mom enlisted help from the QAnon community to kidnap a child in the fall of 2019, police said.
Recently, a Texas woman tried to attack two strangers with her car because she thought they were child predators, police said. She's reportedly a QAnon follower.
An Oklahoma man whose Facebook was filled with #SaveOurChildren messaging has been accused of murdering his girlfriend's 10-month-old baby.