*UPDATE*
So there has finally been a break in the investigation. Three days ago my family received an text message notification stating that we were close to going over out data plan. My parents went into our family plan account to see what was up and they found out that the majority of the data was coming from by brothers phone. So my father contacted the Galesburg police to ask if they were monitoring Zach's phone records. They stated that they were still waiting for the phone company to release the records. So we gave them access to out account and within a day they arrested a man with the phone. He's from Kansas City and was under probation for aggravated burglary. He is now arrested for theft and obstruction of justice. Unfortunately there isn't enough evidence to convict him of manslaughter or attempted murder being that there are no eye witnesses. So hopefully more evidence pops up, he breaks under interrogation, or my brother can I'd him when he wakes up.