After looking into this, I realized that answer to Siebe’s question is not to be found in a sutta.
He asked: “Does anyone know a sutta reference that shows the 5 heinous crimes lead directly to birth in hell after death?’
and,
“I am more specifically searching for a sutta which clearly states that those listed heinous crimes after death immediately lead to rebirth in hell.”
Those five types of strong kamma are called ānatariya kamma (that invariably bring vipāka at the death the current physical body, i.e., will not be carried to future lives).
The five five types of ānatariya kamma are defined in the Abhidhamma Piṭaka, not in the Sutta Piṭaka. They are listed under Pañcakamātikā as: “Tattha katamāni pañca kammāni ānantarikāni? Mātā jīvitā voropitā hoti, pitā jīvitā voropito hoti, arahanto jīvitā voropito hoti, duṭṭhena cittena tathāgatassa lohitaṃ uppāditaṃ hoti, saṃgho bhinno hoti—imāni pañca kammāni ānantarikāni. (9)”.
See, “Khuddakavatthu Vibhaṅga“.
I will write a post in the future on this, but the word “anantariya” comes from “na” + “an” + “antara”, or “without delay”.
While other kamma vipaka may be realized in future lives, vipaka of anantara kamma will occur in this life of more commonly at the end of this life.
There are “good anantariya kamma” too. For example, if one cultivates jhana, one will be born in a brahma realm at the death of the current physical body.