Complex sentence: The title character is a friendly, verbose, disheveled police detective (of Italian descent) who is consistently underestimated by his suspects who are initially reassured and distracted by his circumstantial speech, then increasingly irritated by his pestering behavior.
Split into simpler sentences: The title character is a friendly, verbose, disheveled-looking police detective (of Italian descent) who is consistently underestimated by his suspects. Most people are initially reassured and distracted by his circumstantial speech, then increasingly irritated by his pestering behavior.