An individual who laced candy with tranquilliser and provided them to children at a youth camp in the area has pleaded guilty to sexual offenses against two boys who were between nine and ten.
The accused was detained after eight children and one adult became sick at Stathern Lodge in mid-summer.
The 76-year-old, from the Nottinghamshire area, admitted guilt to a series of 17 offences when he was present at Leicester Crown Court on the end of the week.
However, he refused to admit a single sexual charge he was charged with, which was concerning a nine-year-old boy.
Ruben was remanded in custody ahead of a additional proceeding on 28 November.
'Sweet game'
The prosecutor, presenting evidence, detailed the defendant's actions to the judicial body.
She said his victims were disadvantaged youngsters who were staying at a summer camp which he operated.
Ruben conducted a "treat game" with the children, the legal counsel stated, in which he would go into the sleeping quarters when they were settling down and ask them to consume candy "as fast as possible".
She told the court the man had engaged in this activity with the boys "for many years", and youngsters had earlier experienced illness the next day.
She stated the man had been capable of justifying this for many years as the youngsters being "overwrought by enjoyment", until his stepson had concerns in recently.
The legal representative added: "This year his stepchild had suspicions about what was going on, justifiably.
"They decided to have a look in the man's possessions."
The legal counsel stated objects including infant oil, Vaseline and syringes were located, and his family member alerted the authorities about his concerns.
She said Ruben proceeded to conduct the "treat game" with six boys that time - that Saturday - and they were all sick the following morning.
"The police had not gone out by that time," she continued.
The oversight body, the police conduct office, earlier informed that it was examining law enforcement's management of the incident.
Mrs Prior said the youngsters were struggling to walk due to being ill, so Ruben's stepson notified the authorities a second time.
She explained the defendant then engaged in the "sweet game" in a area of five minors.
