The most sensational story during Tet was the cold‑blooded execution of a Vietcong officer in the streets of Saigon. The shooting followed a street battle between the Vietcong and South Vietnamese marines. An NBC crew recorded the fighting and the assassination in its entirety; an ABC camera operator stopped filming at the moment of death. Both reports aired on the nightly newscasts on 2 February; both contained commentary that was extraordinarily restrained. As the victim was led to his death, NBC's Howard Tuckner explained, "Government troops had captured the commander of the Viet Cong commando unit. He was roughed up badly but refused to talk. A South Vietnamese officer held the pistol taken from the enemy officer. The chief of South Vietnam's national police. Brigadier General Nguyen Ngoc Loan, was waiting for him." Neither Tuckner nor Roger Peterson, who narrated the ABC film, suggested that the shooting was an atrocity or a measure of the authoritarianism of the South Vietnamese regime. For Robert Northshield, the executive producer of the "Huntley‑Brinkley Report," the film was newsworthy not because of its political implications but on account of its stunning images of death. Northshield, though, considered some of the scenes too "rough" for the television audience, and so he trimmed footage of blood spurting from the shattered skull of the victim. Perhaps as many as 20 million people watched the execution film on NBC; many more saw a photograph of the moment of death, published in almost every major newspaper.[60]more clues
I read about it in a book
here almost 40 years later I'm having a hard time digging up the "truth"