Basically, they can't start the criminal process until the extradition process is complete. They don't have "jurisdiction" over him while he's in Illinois. Most of the time...people just waive extradition....but they want to delay until he is represented by a private attorney. Once he has attorney on board, they will probably waive or agree to extradition. It's basically just a delay...and probably related to inmate housing. In Illinois he's in a youth faciltiy. WI is trying him as an adult, so he would go to probably state prison housing during proceedings...which would suck for him or..at best...county jail...but that would also still suck.
Basically, they can't start the criminal process until the extradition process is complete. They don't have "jurisdiction" over him while he's in Illinois. Most of the time...people just waive extradition....but they want to delay until he is represented by a private attorney. Once he has attorney on board, they will probably waive or agree to extradition. It's basically just a delay...and probably related to inmate housing. In Illinois he's in a youth faciltiy. WI is trying him as an adult, so he would go to probably state prison housing during proceedings...which would suck for him.