Complex sentence: During these sequences, York's primary objective is to investigate crimes which took place there in the recent past; collecting photos of pieces of evidence will allow him to "profile" the scene and reconstruct the events that took place with his deductive skills.
Split into simpler sentences: During these sequences, York's primary objective is to investigate crimes that took place there in the recent past. He collects photos of pieces of evidence to use to "profile" the scene and reconstruct events that took place with his deductive skills.