Suicide is a verb and result by itself. Would the author also say “he died by murder”?
But no they would say "died by homicide" not "died by murder".
Not in English. Although it's a verb in many languages, which is why "he suicided" is a common ESL mistake.
In this case, these people were driven to suicide. I would argue that those responsible for the Horizon scandal are guilty of at minimum manslaughter of these poor people.
I agree that the wording isn't ideal, and I agree that the headline fails to capture the nuance of the circumstances that lead to suicide, but I disagree that subeditors who write headlines need to encapsulate that nuance. That's what the article is for.
In 2025 English, suicide is most commonly a noun.
No it isn’t. You can’t say “He suicided.”