Complex sentence: Charlene tells Rizzoli only that there is a goon squad looking for the killers and the person who all the drugs belonged to drove a "Rolls," prompting Rizzoli to pay a visit to Conrad Kroll (Harris Yulin), whom she accuses of drug dealing.
Split into simpler sentences: Charlene tells Rizzoli that there is a goon squad looking for the killers. That prompts Rizzoli to pay a visit to Conrad Kroll (Harris Yulin), whom she accuses of drug dealing.