In 2020, the Offender Database recorded that then 30-year-old William Cauley was arrested following a nationwide manhunt for the sexual violation of a four-year-old girl. The investigation established that the predatory strike took place in Doncaster, South Yorkshire, in September 2016. The prosecution reported that Cauley evaded justice for four years, during which time he utilised a series of aliases—including William McNeilly and Billy Cauley—to facilitate his disappearance and avoid police capture.
The investigation established that South Yorkshire Police launched a significant public appeal to locate Cauley, who had been living in Leeds but maintained active connections across London, Hertfordshire, Humberside, Northern Ireland, and the Thames Valley area. The force reported that the serial child abuse suspect was finally apprehended in 2020 after a tip-off following the social media appeal. Upon his arrest, he was taken into police custody in South Yorkshire to face judicial proceedings for the 2016 assault.
INVESTIGATION AND FUGITIVE STRATEGY
The court reported that Cauley’s ability to remain undetected for four years was attributed to his transient lifestyle and the use of multiple identities. The investigation established that his strikes against a defenceless four-year-old child led to a high-priority police probe involving multiple regional forces. The prosecution reported that Cauley’s evasion identified an individual who prioritised his own liberty over the human rights and safety of children, causing significant distress to the victim’s family during the delay in justice.
Judge-led proceedings following the 2020 arrest were monitored by the authorities to ensure Cauley was subject to the full extent of the law. For his actions in Doncaster and the nature of the serial child abuse reported, Cauley was processed through the South Yorkshire judicial system. The investigation established that his arrest was a critical step in ensuring that those who perpetrate sexual violence against infants are flagged on national databases and permanently monitored.
STATUS AND STATUTORY REQUIREMENTS
Based on the judicial records as of 2020:
- Legal Status: CONVICTED (Sexual assault of a child under 13).
- Custodial Status: SERVING (In 2020, serving the custodial term following his capture).
- Sex Offenders Register: Notification requirements are active FOR LIFE.
- Fugitive Status: APPREHENDED (Manhunt concluded in 2020).
- DBS Status: Placed on the Barred List (Indefinite and permanent ban from any role involving children or regulated activity).
- Judicial Oversight: Sentenced at Sheffield Crown Court; investigated by South Yorkshire Police.
- Criminal Record: Sexually assaulted a 4-year-old girl in 2016; Fled the area and used multiple aliases for 4 years; Arrested in 2020 following a public appeal; Sentenced for predatory strikes.
- Origin: Doncaster, South Yorkshire (Last known address in Leeds, West Yorkshire).
MONITORING AND PUBLIC PROTECTION
Cauley is managed as a Category 1 high-risk offender under the statutory requirements of the Multi-Agency Public Protection Arrangements (MAPPA) Level 3. Due to the nature of his behaviour—specifically his “serial” evasion of the law and the extreme vulnerability of the four-year-old victim—he is a priority for the most intensive post-release supervision. Authorities reported that the 2020 conviction ensures Cauley is permanently flagged on national databases, meaning any attempt to hold a position of trust or work with children in Doncaster, Leeds, or elsewhere will be blocked.
As a registered sex offender for life, his details are permanently logged on the national police database. Authorities state that Cauley’s behaviour identifies an individual who prioritised his own gratification and self-preservation over the safety and human rights of a child. Any failure by Cauley to adhere to his notification requirements or his restrictive court orders upon his eventual release will result in immediate police intervention to ensure the ongoing safety of the public from a man who has violated the principles of human decency.
QUESTION – Given that the offender used “Multiple Names” to evade police for four years, do you believe the law should legally mandate that all registered sex offenders must provide their “Fingerprints and DNA” to every employer, landlord, or bank they interact with for the rest of their lives?
If you or anyone you know has been affected by the individuals highlighted on this website, please report them to the Police on 101 (999 in an emergency) or visit their online resources for further details on reporting a crime. You can also report to Crimestoppers if you wish to remain completely anonymous. There is help available on our support links page.

