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MILWAUKEE (WITI) -- He's accused of sexually abusing students for more than a decade. Now, investigators want to know if there are more victims out there -- and, whether he met them while working at a Milwaukee charter school.
Documents obtained by FOX6 News reveal Brown Deer police subpoenaed Milwaukee Public Schools for the employment records of Ronnie Johnson -- saying they have reason to believe the records may point them to more victims.
Johnson is set to stand trial in the case against him.
An amended criminal complaint with new charges was filed against 46-year-old Johnson on August 12th.
The amended complaint adds a total of nine new charges including sexual assault of a child under 13 years of age (six counts), repeated sexual assault of a child (one count) and second degree assault of a child (two counts).
Johnson had already faced the following charges (14 total counts):
Johnson was most recently the Vice President of Education for the Midwest Region of Universal Companies, and played a role in preparing a north side Milwaukee school to open in August. He was fired after notice of his arrest.
Johnson initially faced charges involving three boys. But later, the complaint against him was amended to include charges involving two others.
The latest two alleged victims are grown men now, who had written letters to Johnson asking him to explain why he abused them. Those letters were found by investigators in Johnson’s Brown Deer home while investigating the other cases.
According to the amended criminal complaint, victim #4 is now 24 years old and in prison. After finding his letters, investigators interviewed him.
“He had said that Mr. Johnson had sexually assaulted him and it started with him touching and rubbing on him, to him performing oral sex on Mr. Johnson which he says was approximately five times. He estimated and that was around when he was the age of eight,” said Brown Deer Police Officer Melissa Fus.
The alleged victim told detectives the sexual abuse escalated — and when asked how often it happened, he replied, “All the time.”
According to the complaint, like some of the others, the alleged victim’s parent encouraged him to spend time with Johnson because he was thought to be a good role model. The complaint says the sexual abuse occurred at Johnson’s residences, including the one in Brown Deer, over many years — between 1997 and until June 2013.
Back in 2002, FOX6 News spoke with Johnson while he served as the principal of the Milwaukee charter school, Young Leaders Academy.
A subpoena obtained by FOX6 News indicates Brown Deer Police subpoenaed MPS for Johnson's employment records, to include "any complaints or allegations made by students or parents."
The subpoena says "Johnson initially met his victims through his positions with the Milwaukee Public School District prior to being employed at Young Leaders Academy" -- and that the documents "may identify additional victims."
Johnson has pleaded not guilty, and posted his $100,000 bond in September. FOX6 News stopped by his home on Tuesday, November 12th, but no one answered.
Meanwhile, MPS issued a statement saying simply: "We cooperated with Brown Deer Police and provided personnel records as requested."