Mark Grindon was found in possession of indecent images of children. Photo credit should read: Dominic Lipinski/PA Wire. A PAEDOPHILE appeared in court where it was revealed he had stored nearly 50,000 indecent images of children. Mark Grindon admitted seven counts relating to possession of sick sexual abuse images at Mannings Heath near Horsham. The 37-year-old was already convicted of similar offences in 2014 and Chichester Crown Court ordered him not to possess devices capable of viewing the internet without being monitored by the police. But Grindon created an alias without notifying the police, breaking his obligations under the sex offenders register.