Kojak (1973)

S3E14 A House of Prayer, a Den of Thieves

Kojak receives a call from a former associate in Las Vegas, who claims to have apprehended a notorious counterfeiter that Kojak has been pursuing. However, before Kojak can arrange to transport the suspect back to New York, the elderly informant is killed, thwarting Kojak's plans and leaving him to unravel the mystery behind the man's death.