A man who laced treats with sedative and provided them to minors at a summer program in the area has confessed to sexual crimes against two children who were nine and 10.
The defendant was taken into custody after eight children and a grown-up fell ill at Stathern Lodge in July.
The elderly man, from the Nottinghamshire area, confessed to a series of 17 offences when he stood at the courthouse on Friday.
Nevertheless, he refused to admit one of the sexual offences he was accused of, which was against a nine-year-old boy.
Ruben was held in detention ahead of a additional proceeding on 28 November.
'Sweet game'
The prosecutor, handling the case, outlined the criminal behavior to the judicial body.
She said his targets were children from difficult backgrounds who were attending a summer camp which he managed.
Ruben engaged in a "sweet game" with the children, Mrs Prior stated, in which he would enter the sleeping quarters when they were preparing to sleep and tell them to ingest treats "rapidly".
She stated to the judge the man had conducted this practice with the children "for many years", and children had previously become sick the next day.
She stated the defendant had been successful in rationalizing this for many years as the minors being "overstimulated by activities", until his stepchild had concerns in recently.
The legal representative added: "Recently" his family member had worries about what was going on, with valid cause.
"They resolved" to have a look in the man's possessions."
Mrs Prior KC explained materials including infant oil, Vaseline and syringes were discovered, and his family member notified the police about his worries.
She explained the man continued to play the "candy game" with six youngsters that evening - that Saturday - and they were all sick the following morning.
"The police had not gone out by that point," she stated further.
The regulatory agency, the investigative body, had stated that it was investigating the police response of the events.
The legal representative stated the minors were unable to walk properly due to their sickness, so the family member contacted the law enforcement once more.
She explained the defendant then engaged in the "treat game" in a space of five minors.