Pretty much this.
Jack Ruby was part of Project Delta a child procurement operation. Hoover was also a member along with other prominent politicians and Hollywood stars.
Most child serial killers were farmers for Delta group and its churches. Corll, Gacy and Son of Sam.They are all linked to Paske who never spent one day in jail despite being prosecuted for murder.
https://en.wikipedia.org/wiki/Phillip_Paske