In 2026, the Offender Database recorded that Siah Riley, then 35, of Walbrook Road, Derby, Derbyshire, admitted to 164 online child sex offences against more than 130 children. On Wednesday, 18 February 2026, Riley appeared at Derby Crown Court where he pleaded guilty to 144 charges, including 117 counts of causing or inciting a child to engage in sexual activity and 22 counts of blackmail. The court reported that the defendant targeted at least 132 victims through digital platforms.+1
The investigation established that Riley was initially arrested in 2023 in relation to offences against two victims. Following the seizure of his electronic devices, Derbyshire Constabulary discovered a “huge catalogue” of material documenting widespread abuse. He was rearrested in February 2025 and subsequently remanded. Prior to his most recent appearance, Riley had already admitted 20 further offences during hearings in February and April 2025, which included breaching a Sexual Harm Prevention Order (SHPO) and making indecent images.
Judicial Findings and Investigative Detail
The court reported that Riley’s offending was vast in scale and involved a calculated use of blackmail to coerce children. Derby Crown Court heard that the defendant’s devices contained evidence of sexual communication and incitement spanning multiple years. The prosecution reported that a charge of arranging or facilitating the commission of a child sex offence was denied by Riley and will remain on file following his guilty pleas to the other 164 counts.
The judge noted that the sheer number of victims and the severity of the blackmail charges necessitated a comprehensive sentencing hearing. For his actions in Derby, Derbyshire, Riley was remanded in custody. The judge reported that he is due to be sentenced at Derby Crown Court on 7 May 2026, where he faces a substantial term of imprisonment reflecting the “industrial scale” of his online predatory behaviour.
Sentence and Statutory Requirements
For his crimes in England, Siah Riley was handed:
- Custodial Sentence: Remanded in custody (Sentencing scheduled for 7 May 2026).
- Sex Offenders Register: Notification requirements will be activated for life.
- SHPO: A lifelong Sexual Harm Prevention Order (SHPO) is anticipated.
- Judicial Oversight: Convicted at Derby Crown Court following a complex digital forensic investigation.
Monitoring and Public Protection
Riley is managed under Multi-Agency Public Protection Arrangements (MAPPA) by Derbyshire Constabulary and the prison estate. Due to the “unprecedented scale” of the digital abuse and blackmail in Derby, Derbyshire, his management is subject to the highest level of oversight by the Public Protection Unit.
As a member of the Sex Offenders Register, Riley must comply with notification requirements regarding his residence in Walbrook Road, Derby, for the rest of his life. Authorities state that his history of breaching existing prevention orders and his use of blackmail necessitates permanent and intense scrutiny of his conduct and internet access. Any breach of his registration conditions or his future licence terms will result in immediate arrest and a return to Derby Crown Court.
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