Complex sentence: He then returns to the polcie station where he meets with a polcie sketch artist and he tries to create a police sketch of the killer, the sketch artist does a lousy job, and forces Dr. Krane to draw the picture himself.
Split into simpler sentences: He then returns to the police station where he meets with a police sketch artist and tries to create a police sketch of the killer. The sketch artist does a poor job, and forces Dr. Krane to draw the picture himself.