William Pratt

"We're gonna live forever."

William Pratt, a.k.a. "The Mirror Man", is a delusional teenage serial killer and stalker who appeared in Hashtag.

Background
In 2013, William lost both of his parents in a car accident, and he went to live with his aunt afterwards. As a result of the loss, he became shy and withdrawn. He befriended a fellow student and amateur writer named Connor Holt, whom he helped create "The Mirror Man", an entity in creepypasta. The lore of The Mirror Man described it as appearing in windows or mirrors behind people as they post photos of themselves (or selfies). When the tale of The Mirror Man became extremely popular on the Internet, William, looking up to Connor as a role model and wanting to please him, decided to give the fictional entity more popularity through a series of murders based on it. He decided to target Tara Harris, a teenage girl moonlighting as a famous online celebrity, as his first victim, likely being jealous or agitated by her popularity, which was due to her increasingly raunchy selfies and rebellious attitude towards her parents.

Hashtag
Eventually, on the night of November 14, 2014, William kills Tara by bashing her head against a mirror, then stabbing her and slashing her throat with a shard of the mirror. Afterwards, he poses a selfie of Tara and posts it online with the "fear me" hashtag. The attack draws the attention of the BAU, who all become worried that the massive amount of public attention revolving around this murder will provoke the unsub to strike again. Whilst enjoying the media circus around him for the entire day, William goes to the local shopping mall with Connor and Daniel Osbourne, discussing The Mirror Man lore with them. The trio then spot Alexander Chase, and William learns that he and Tara made a challenge video together. The following night, he ambushes Alexander as he is seated in his convertible, repeatedly shooting him in the back with a nail-gun, making sure that the pattern resembles a hashtag symbol in the back of his seat, then executes him with a shot to the neck. He then poses another selfie and names himself 'Mirror Man' in the newest message, not liking the title of 'Selfie Killer' that the media gave him. William then watches a video of Daniel mocking The Mirror Man, and trashes his computer in a fit of rage. Going to Daniel's house the following night, he ambushes and kills him.

When Connor is brought in for questioning by the BAU, William bikes past his house and sees the news cameras discussing The Mirror Man, pleasing him. He then arrives at the shopping mall to attend to his job at the kiosk, bringing the nail-gun with him. As he locks his bike, he notices a government-issued SUV containing Morgan, JJ, and Kate driving up, the BAU having identified him as the unsub with Connor. Panicking, he flees into the parking lot and takes a shopper, Kimmy, hostage with the nail-gun. Morgan, JJ, and Kate hold him at gunpoint, and William demands to see Connor. He is nearly talked down, but a news van drives up, and the news crew records the standoff live, essentially giving him an audience. Emboldened by this, William turns to the camera's direction and shoots Kimmy in the neck, getting shot by the agents in return. He is taken to the hospital, along with Kimmy. Despite losing a lot of blood and having some nerve damage, he survives his gunshot wound, while Kimmy is also saved in time. Connor visits William, and the latter remarks that they and The Mirror Man are going to be famous, adding that he'll be released soon, being a minor. All the while, Connor expresses shock at his attitude. William finally asks Connor for his cellphone; when Connor gives it to him, he takes a selfie, saying, "No one will ever believe I got shot."

Modus Operandi
William found all of his victims through the local shopping mall where he worked. He targeted his first victim, Tara Harris, for her status as a popular online celebrity. He broke into her home and intended to kill her by shooting her with a nail-gun as a reference to The Mirror Man's clawed hands. Instead, he bashed her head against a mirror, then slashed her in the abdomen and killed her by slashing her throat with a shard of the mirror. This was provoked after he saw her looking at herself in the mirror and wanted to act on the irony of her being vain. He then targeted his second victim, Alexander Chase, due to his connection with Tara. He killed him by shooting him through the neck from behind with the nail-gun while Alexander was seated in his convertible. His third victim, Daniel Osbourne (who was a former fellow student and one of William's friends), was targeted after the latter posted a video on Twitter challenging and insulting him. He shot him repeatedly in the hand, forced his way inside his home, and shot him again in the rear thigh with the nail-gun before torturing him by stepping on the areas where the nails hit; he then executed him by shooting him repeatedly in the face. Prior to killing his victims, he would tag them with selfies of themselves, altered with The Mirror Man behind them.

For the first two murders, William would pose selfies with the victims and post them online with the message "Fear me"; the message for the second selfie also included "#MirrorMan" due to his dissatisfaction with being called "The Selfie Killer" at the time. Also, during the second murder, he fired his nail-gun repeatedly at the back of the driver's seat of Alexander's car, forming a hashtag with the holes as a calling card.

Profile
The unsub was originally profiled as an older man, aged in his late 30s to early 40s, based on the organization and sophistication put into the killings. He is a narcissistic sadist who is blitz-attacking his victims with weapons of opportunity. He sees these weapons as symbols of his victims' vanity. For the first victim, he used a mirror, then nails made in the form of a hashtag for the second victim. A hashtag is a popular method of topic-tagging on social media websites; these murders are essentially the unsub's way of making an online statement. He is trying to make a name for himself by building off from the Internet legend of The Mirror Man. He is becoming immortal as the stories and legends grow, fueling him to only act again. He is probably not socially adept in his personal life and is most likely subservient to his peers, although he does not view it that way. His need for attention probably stems from abandonment in early childhood. He is also technologically proficient, as he was to alter a twisted image of Mark Twain onto his victims' photos. His usage of a distortion of Mark Twain as the face of The Mirror Man is very important to him, as Twain was described as the father of American literature, and this unsub sees himself similarly; he wants to become the forefather of modern lore. He will be monitoring web traffic, media websites, and chat-rooms as he enjoys the panic and hysteria created by his crimes. The victimology seems personal, which suggests that the next victim will be someone connected to the first victim. His endgame will involve fame and/or fear in some way.

The unsub was later revealed to be a teenager due to the impulsiveness and rage that was evident in the third murder. He is devolving and no longer killing people to show how great he is, but killing the people who insult him. He has decided to literally bring the tale of The Mirror Man to life. He would look up to Connor Holt, the creator of The Mirror Man, and even be younger than him. He is quiet and clings on to his friends because they are all he has. He likely suffered a recent abandonment or loss of a loved one. He may have also aided in the development of The Mirror Man, judging by the two completely different types of handwriting found on personal creator's notes on the legend.

It is difficult to determine whether William is a serial or spree killer. While he targeted specific victims, planned out most of the murders beforehand, and had a specific M.O., it should be noted that he attacked his victims almost daily and was disorganized during the actual murders, which is uncharacteristic for usual serial killers.

Real-Life Comparison
William's murders seem to be based on a series of attacks, all of which were isolated incidents and allegedly inspired by the Slender Man, a fictional character that originated from creepypasta. Like the perpetrators of the incidents, William attacked his victims in a manner similar to what was described in the lore of a creepypasta character; however, unlike the real-life perpetrators, William was successful in actually killing his victims. The most notable of these real-life incidents, which occurred in Waukesha County, Wisconsin, and was perpetrated by two twelve-year-old girls, identified as Morgan Geyser and Anissa Weier, was also compared to William by the BAU.

Known Victims

 * 2014:
 * November 14: Tara Harris
 * November 15: Alexander Chase
 * November 16: Daniel Osbourne
 * November 17: Kimmy

Appearances

 * Season Ten
 * "Hashtag"