An individual who laced treats with tranquilliser and gave them to children at a youth camp in the area has pleaded guilty to sexual offenses against two children aged nine and 10.
The defendant was detained after eight children and an older person became sick at Stathern Lodge in July.
The senior citizen, from that region, confessed to a series of 17 offences when he was present at Leicester Crown Court on recently.
Nevertheless, he disputed one particular crime he was charged with, which was involving a young boy.
The defendant was remanded in custody before a subsequent court date on 28 November.
'Candy game'
The prosecutor, handling the case, detailed the defendant's actions to the judicial body.
She explained his targets were under-privileged children who were attending a summer camp which he operated.
The man played a "sweet game" with the minors, the legal counsel said, in which he would enter the children's bedrooms when they were getting ready for bed and tell them to ingest treats "as fast as possible".
She informed the proceedings the man had engaged in this activity with the children "repeatedly", and youngsters had earlier experienced illness the next day.
She said the defendant had been successful in rationalizing this repeatedly as the minors being "overexcited from fun", until his stepson had worries in recently.
The legal representative stated further: "In the summer" his stepson had suspicions about the activities, justifiably.
"They decided to investigate in the defendant's belongings."
The prosecutor said items including lubricant, petroleum jelly and injection devices were located, and his stepson notified the authorities about his concerns.
She explained the defendant continued to play the "candy game" with six youngsters that evening - that Saturday - and they were all ill the subsequent day.
"Authorities" had not gone out by that time," she stated further.
The oversight body, the investigative body, had stated that it was examining Leicestershire Police's handling of the situation.
The legal representative said the minors were unable to walk properly due to their sickness, so Ruben's stepson notified the authorities once more.
She stated the man then engaged in the "treat game" in a area of five minors.