Benjamin Coman held delusions that his ex-partner's unborn baby was not his when he killed the mother-of-two at their former family home.
He was also paranoid supermarkets were poisoning his food, he was being spied on and a client was trying to defraud him of money, a Melbourne court has been told.
Coman, 31, faced the second day of a pre-sentence hearing on Tuesday after he pleaded guilty to the October 2021 murder of Michelle Darragh, 32, inside the home they once shared with their children in Bayswater North.
