i know that at least one of them or her parents either went to the police and signed a criminal complaint or otherwise cooperated in a criminal investigation related to an allegation of child rape/child porn.

also, Aaliyah's parents complained about Kellz marrying Aaliyah w/o their consent and the marriage was annulled on that basis. Aaliyah either never spoke publicly about Kellz after the annulment or i just haven't read it. whereas before she talked about the 2 of them being friends. further, her uncle's label owns Aaliyah's music (i think) and the label recently released a hits compilation that all but ignored the music Kellz made w/Aaliyah.

based on all of that i think at least 1 or 2 of Kellz' 'victims' complained.