Complex sentence: Then Mayor Roman S. Gribbs summoned Murphy to become police commissioner in Detroit in the first days of 1970, but a burgeoning scandal in his home NYPD soon drew him from Detroit.
Split into simpler sentences: Then Mayor Roman S. Gibbs summoned Murphy to become police commissioner in Detroit in the first days of 1970. But a burgeoning scandal in his home NYPD soon drew him from Detroit.