A person who contaminated treats with tranquilliser and provided them to children at a summer program in the area has admitted sexual offenses against two boys who were nine and 10.
The defendant was detained after eight children and one adult fell ill at the location in July.
The 76-year-old, from the Nottinghamshire area, pleaded guilty to a multiple criminal counts when he was present at Leicester Crown Court on Friday.
Nevertheless, he refused to admit one of the sexual offences he was accused of, which was against a young boy.
The defendant was remanded in custody prior to a subsequent court date on November 28th.
'Sweet game'
The legal representative, handling the case, described the criminal behavior to the court.
She explained his those affected were disadvantaged youngsters who were staying at a youth camp which he managed.
Ruben engaged in a "candy game" with the children, Mrs Prior explained, in which he would enter the sleeping quarters when they were preparing to sleep and ask them to consume candy "rapidly".
She informed the proceedings Ruben had conducted this practice with the young males "repeatedly", and children had earlier experienced illness the next day.
She explained the man had been able to explain this repeatedly as the children being "overwrought by enjoyment", until his stepchild had worries in recently.
The prosecutor continued: "This year his family member had suspicions about the situation, for good reason.
"They chose" to have a look in the man's possessions."
The prosecutor said materials including baby oil, petroleum jelly and syringes were found, and his family member contacted the law enforcement about his concerns.
She stated Ruben went on to play the "candy game" with six boys that evening - that Saturday - and they were everyone unwell the next day.
"Law enforcement" had not gone out by that time," she added.
The police watchdog, the police conduct office, previously told that it was examining the police response of the events.
The prosecutor stated the minors were struggling to walk due to being ill, so the stepson contacted the authorities a second time.
She stated the man then played the "sweet game" in a area of five youngsters.
