Complex sentence: Fisk was a key player in the fleet's black market ring, but his greed raised the ire of Phalen, the market's leader, who had Fisk garrotted in his quarters.
Split into simpler sentences: Fisk was a key player in the fleet's black market ring. However his greed raised the ire of Phalen, the market's leader, who had Fisk garrotted in his quarters.