Complex sentence: Police, relatives, and neighbors described him as a high-stakes gambler; and police said he had made casino transactions in the tens of thousands of dollars prior to the shooting, but did not specify whether these transactions were losses or wins.
Split into simpler sentences: Police, relatives, and neighbors described him as a high-stakes gambler. Police said he had made casino transactions in the tens of thousands of dollars prior to the shooting, but did not specify whether these transactions were losses or wins.