It took no time at all after news broke of the March 27, 2023, school shooting in Nashville, Tennessee, in which six people including the female suspect were killed, before posts flooded social media falsely claiming that the shooter had been identified as one "Samantha Hyde."
Some posts claimed "Samantha Hyde" identified as a "trans woman":
The name "Samantha Hyde" probably rang familiar to many long-time internet users. For years — since 2015, according to the meme-tracking website Know Your Meme — mass shooting incidents in the U.S. have been routinely followed by false accusations that a male suspect named Sam Hyde (or Samuel Hyde, or other variants of that name) had committed or been arrested for the crimes. Although the hoax originated as a 4chan smear campaign against an actual person by that name, over time "Sam Hyde" memes morphed into new variants and the meme took on a life of its own. (After a mass shooting at a Baptist Church in 2017, a variant of the hoax claimed the perpetrator was a "Muslim convert" named "Samir Al-Hajeed.")
Here's an example of the "Sam Hyde" hoax from 2018:
The actual suspect in the Nashville school shooting has been identified as Audrey Hale, 28, of Nashville. According to police, Hale identified as transgender and was a former student of the school.