Reduxx has confirmed that a prominent trans activist known for having at least two women arrested for “hate speech” was previously convicted of indecent assault on a 14-year-old boy, and was a registered sex offender.

Stephanie Hayden, formerly known as Anthony Halliday, pleaded guilty in 1999 to sexually assaulting a 14-year-old boy he met through the internet.

According to court records and archived news reports reviewed by Reduxx, Hayden was found guilty of abusing the boy on at least two occasions in 1997, meeting with the victim and proceeding to “kiss and touch him” before driving him back to his parent’s house. Hayden accepted two charges of indecent assault in 1999, and was ordered by Judge Gerald Clifton to pay a £600 fine and to register as a sex offender for five years following the verdict.

During court proceedings, Judge Clifton remarked: “I’m told he was willing. Had this been a case of you seducing a boy and indulging in oral sex with him then whether he consented or not, whether in private or not, a short sentence of imprisonment would have been necessary.”

But Hayden’s past criminal conduct, which includes another violent offense, has largely become obfuscated by his vocal trans advocacy. While Hayden previously identified as a gay man, he began transitioning in 2017 and has subsequently become a key proponent of pro-trans policy in the United Kingdom.

Hayden’s experience as a self-styled lawyer has enabled him to utilize the courts to silence those he accuses of “transphobia,” and he has gained a self-confessed reputation for being particularly litigious.

Hayden has initiated legal action against more than two dozen individuals over the years, often in an apparent effort to prevent them from referring to him as a “man,” or quashing speculations regarding his past criminal history. In total, Hayden had filed approximately 40 complaints altogether, and multiple individuals have been arrested for “hate speech” after he complained to police.

In October of 2018, Hayden launched Britain’s first “deadnaming” case in London’s High Court against famed Irish comedy writer Graham Linehan. In the court filing, which accused Linehan of libel, harassment and misuse of private information, Hayden alleged that Linehan had “deadnamed” him by sharing content from a separate X (formerly Twitter) account which included former photos of Hayden, when he was still known as Anthony Halliday, and referenced his criminal history.

Hayden also accused Linehan of libel and cited social media posts in which Linehan referred to him as a “misogynist” and “sex offender.”

In one of the posts, published on September 26 of that year, Linehan wrote: “I don’t respect the pronouns of misogynists, stalkers or harassers.” In another, Linehan posted: “Yes, we must always be nice to con men, sexual predators and misogynists hijacking a noble movement for their own ends.”

Just two months after filing a suit against Linehan, Hayden successfully had a Hertfordshire mother named Kate Scottow arrested at her home in front of her young daughter and infant son. Scottow’s arrest came after Hayden made a series of complaints to police about her social media posts, specifically that she had referred to him by “he/him” pronouns.

Scottow was held in a cell for several hours before being questioned about her comments and her devices were seized and held by police for months.

During proceedings, Hayden said Scottow had “violated” his “dignity as a woman.”

Scottow was initially found guilty of “persistent