A person who laced sweets with tranquilliser and gave them to children at a summer camp in Leicestershire has confessed to sexual offences against two young males aged nine and 10.
The accused was taken into custody 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 appeared at the judicial center on Friday.
Nevertheless, he disputed one of the sexual offences he was facing, which was against a nine-year-old child.
The accused was kept in jail before a further hearing on 28 November.
'Sweet game'
Mary Prior KC, prosecuting, outlined the defendant's actions to the judicial body.
She stated his victims were disadvantaged youngsters who were staying at a summer program which he operated.
The man engaged in a "candy game" with the minors, the legal counsel said, in which he would access the boys' rooms when they were getting ready for bed and ask them to consume candy "as fast as possible".
She stated to the judge the defendant had engaged in this activity with the boys "for many years", and children had earlier experienced illness the subsequent day.
She said the man had been able to explain this for many years as the youngsters being "overwrought by enjoyment", until his family member had suspicions in recently.
The legal representative continued: "This year his family member had worries about the activities, justifiably.
"They resolved" to examine in the man's possessions."
Mrs Prior KC said items including infant oil, ointment and injection devices were discovered, and his stepchild contacted the law enforcement about his worries.
She said Ruben continued to conduct the "sweet game" with six youngsters that time - July 26th - and they were all sick the following morning.
"Law enforcement" had not responded by that point," she stated further.
The regulatory agency, the investigative body, earlier informed that it was investigating Leicestershire Police's handling of the events.
Mrs Prior said the minors were unable to walk properly due to being ill, so the stepson notified the law enforcement once more.
She stated Ruben then engaged in the "sweet game" in a space of five children.