Illinois law enforcement officials this week are expected to issue a report on the power of prevention in the wake of the opioid crisis. A handful of state’s attorneys and police officers will unveil research on the power of so-called home-visit programs, which “provide voluntary parent-coaching for at-risk families” and aim to stop drug use before it starts. They are also expected to “call on the Illinois General Assembly and Governor Rauner to bolster such efforts” during a press conference …