Complex sentence: Zook stole the revolver from another cousin with whom he was staying on August 16th, he was recovering from a motorcycle accident which he blamed on Bloomfield and factored in his motive for the murder.
Split into simpler sentences: Zook stole the revolver from another cousin with whom he was staying on August 16th. He was recovering from a motorcycle accident which he blamed on Bloomfield and factored in his motive for the murder.