The Mail had an article that included a photo of the occult symbols Danyal Hussein had drawn to accompany his contract with "the devil".
The symbols are sigils from the grimoire The Lesser Key of Solomon
The sigils relate to the following demons
Paimon, Bune, Focator and Beleth
The demon Paimon featured in the horror film Hereditary and it is possible that Hussein watched Hereditary, looked up Paimon online and discovered The Lesser Key of Solomon and developed his horrific strategy from there.
I mention this because the sigils he drew and the demon he penned a contract with are all mentioned in the Lesser Key of Solomon (a C17 grimoire, later translations and publications of which can be bought easily online) and were not simply plucked from his imagination.
In fact the sigils for the demons found in Hussein's bedroom can be found via wikipedia, so he would not have even needed to buy the book.
Of course none of this is as important as the fact that 2 wonderful, innocent sisters were horiffically murdered. I am sharing the info about the sigils because posters here have assumed that the alleged murderer must be mentally ill based on his diabolic contract. I have no idea whether he is mentally all but feel that, under the circumstances, we should not jump to conclusions about his motives (if guilty).