A former Metropolitan Police officer has admitted child pornography charges at Bow Street Magistrates Court.
Indecent images were found on Fillery's computer
Sydney Fillery, 57, a detective sergeant at Catford police station until 1989, faces jail after giving guilty pleas to 13 counts of making indecent images of children.
The charges against Fillery, now a private detective living in Sevenoaks, Kent, related to boys in their early teens.
He has been placed on the sex offenders register and released on conditional bail until 24 October.
The court heard police found the images after confiscating his computer during a search of his work premises in Grange Road, Thornton Heath, south London.
Evidence was discovered that Fillery had been surfing the internet for images of young boys of a sexual nature.
Hugh Davies, prosecuting, said the majority of images were considered level one and two -
the least serious in a scale of five - but others were arguably level three and even level four.
"The search indicated a mature interest and a specific interest in sordid
material," Mr Davies told the court.
Detective Chief Superintendent David Cook, from the Specialist Crime Directorate of the Metropolitan Police, said outside the court: "This sort of crime - this sort of offence - is just unacceptable in society.
"The fact that he was a former police officer just compounds it."
Fillery was forced to leave the police due to illness.