Not technically a murder but pretty close, this case goes through several very plausible twists to find the killer, showing off Jack's solid detective skills, and an interrogation technique from the others that would be seriously problematic in real life, but we can enjoy for the show. This episode most resembles later seasons, so if you enjoy those and are moving backwards like I did, or are watching forwards, you'll know what to look for.
The added Indian? India region? However you want to call it policemen worked well, he had his own character with some good interactions with the main team.