A man who provided sweets to children at a summer camp which he had laced with sedatives has pleaded guilty to 17 offences.

Jon Ruben, 76, admitted offences including wilful ill treatment of eight children and possession of class C drugs following a police investigation which Senior Investigating Officer Temporary Detective Chief Inspector Neil Holden today (Friday) described as “horrific, complex and emotional”.

Ruben, of Wayte Court, Landmere Lane, Ruddington, Nottingham, also admitted sexual offences against two children and charges of possession of indecent images of children when he appeared at Leicester Crown Court today. None of the images concerned relate to children who were at the summer camp.

The charges Ruben admitted are:

• Eight counts of wilful ill treatment of a child in relation to eight separate victims

• One count of acquiring or possession of dutiable goods by fraudulent intent

• Three counts of possession of a class C drug

• Three counts of making indecent photographs of a child.

• One count of assault by penetration of a boy under 13

• One count of sexual assault of a boy under 13.

Ruben pleaded not guilty to a second charge of assault by penetration of a boy under 13.

The charges came following police attending Stathern Lodge, Canal Lane, Stathern, near Melton, on Monday 28 July this year following concerns raised that a number of children had become unwell while at the camp there which was being run by Ruben. A report was made that Ruben, who ran a charity providing short holiday breaks for children, may have been drugging children at the camp with a number of children reported to be unwell including feeling drowsy and sick.

East Midlands Ambulance Service also attended the scene with eight children, who were all boys aged between eight and 11, being taken to hospital as a precaution. An adult was also taken to hospital at the time. All were later discharged.

At the time of police attending, Ruben was found to be at a nearby pub with some of the children. He was arrested by officers at the pub and transported to custody.

Searches were carried out at Stathern Lodge with items including syringes and sedatives being found.

While initial investigative work led to Ruben being charged four days later on Friday 1 August with three counts of wilful ill treatment of a child, the force’s Major Crime team then continued more than three months of detailed and dedicated enquiries to uncover further evidence of Ruben’s crimes.

This included statements being taken from victims and witnesses, exhibits being sent off for examination and analysis of digital devices seized.

These enquiries led to it being found that on the evenings of Saturday 26 July and Sunday 27 July, Ruben had carried out a ‘sweet game’ with a number of children at the lodge which involved encouraging them to eat the sweets.

Following toxicology tests, a sedative was found to be present in children at the camp as well as within sweets which had been provided to the children. Inspection of the sweets found incision marks had been made.

Analysis of devices belonging to Ruben were found to contain more than 50 category A indecent videos of children. Category A images as well as Category B and C videos were also found. The categories indicate the seriousness of the content shown with category A being the highest.

The enquiries carried out also found evidence that Ruben had sexually assaulted two boys – both victims were under 13-years-old.

The evidence gathered by the investigating team led to Ruben being further arrested in October this year on suspicion of further offences and interviewed. Charges in relation to all alleged offences were then put to Ruben at court today.

Temporary Detective Chief Inspector Holden said: “This has been a horrific, complex and emotional investigation involving multiple young, innocent, vulnerable victims and a man who committed the vilest crimes.

“Our focus today must of course remain on the young victims and with the support of partners and dedicated Family Liaison Officers, we have and continue to support their welfare and to ensure their safeguarding going forward.

“I know the investigation at the time and these guilty pleas today has and will understandably cause concern within communities. Please know that we are here for you and to speak with you. You can contact police through the Public Portal at Public Portal, reporting online at www.leics.police.uk, by calling 101 or by speaking directly with an officer. Thank you.”

The owners and operators of Stathern Lodge are independent from those people who use or hire the lodge and are not connected to the incident.