The line crossed
Deliberately taking a human life; the threat here signals a serious risk of that wrong.
Commandment 6 · Value human life

A conflict outside school has escalated. Someone sends a credible threat to kill another student and shares where they plan to find them. A group chat wants to watch and record it. This is no longer banter or a chance to collect a dramatic clip.
Thou shalt not kill.Exodus 20:13 · King James Version
There is a cost behind every answer. Choose one to examine it.
Deliberately taking a human life; the threat here signals a serious risk of that wrong.
Valuing life by seeking urgent responsible help and refusing to fuel violence.
The command forbids killing. The response in this case is a practical way to protect life, not an instruction to confront a violent person.
Name the trusted adults and emergency route you would use. Explain why forwarding a threat for entertainment differs from showing it to someone who can help.