Drugs likely came to Prince illegally

The disclosure that some pills found at Prince's Paisley Park home and studio were counterfeit and contained the powerful synthetic opioid fentanyl strongly suggests the pills came to the superstar musician illegally.

But exactly how Prince obtained the drugs is still unknown, four months after he collapsed in an elevator on April 21 and died of an accidental fentanyl overdose. Authorities have so far revealed little about their investigation, saying it's active and moving forward.

Former prosecutors and defense attorneys who are familiar with drug investigations say it's likely someone will be prosecuted, whether or not Prince knew he was consuming illegal drugs.