A man who laced treats with tranquilliser and distributed them to minors at a summer camp in the area has admitted sexual crimes against two young males both between nine and ten.
The defendant was taken into custody after eight youngsters and one adult fell ill at Stathern Lodge in July.
The 76-year-old, from the Nottinghamshire area, admitted guilt to a total of 17 charges when he appeared at the courthouse on Friday.
However, he denied one of the sexual offences he was accused of, which was against a nine-year-old child.
The accused was kept in jail before a additional proceeding on late November.
'Candy game'
The legal representative, prosecuting, outlined the defendant's actions to the judicial body.
She explained his targets were disadvantaged youngsters who were participating in a youth camp which he operated.
The defendant conducted a "treat game" with the children, the legal counsel explained, in which he would enter the children's bedrooms when they were getting ready for bed and tell them to ingest treats "rapidly".
She informed the proceedings Ruben had engaged in this activity with the boys "repeatedly", and children had earlier experienced illness the following morning.
She explained the man had been able to explain this over a long period as the youngsters being "overwrought by enjoyment", until his stepson had concerns in recently.
The prosecutor continued: "Recently" his family member had worries about what was going on, justifiably.
"They decided to have a look in the man's possessions."
The legal counsel explained materials including baby oil, Vaseline and syringes were discovered, and his family member alerted the law enforcement about his worries.
She said Ruben went on to engage in the "treat game" with six boys that evening - Saturday 26 July - and they were all sick the next day.
"The police had not responded by that stage," she added.
The regulatory agency, the police conduct office, previously told that it was investigating the police response of the events.
The prosecutor explained the children were unable to walk properly due to their condition, so the stepson called the law enforcement once more.
She explained the man then engaged in the "treat game" in a space of five children.
