Rarely if ever hear a good sermon about the "sin of suicide". It should be preached, but NOT at the funeral.
PRIEST SHOWS NO COMPASSION AT SUICIDE FUNERAL. Preach before, not after "Michigan teenager who committed suicide criticised by priest at his funeral "
https://www.independent.co.uk/news/world/americas/priest-criticised-teen-suicide-funeral-detroit-a8684751.html