A woman who knew Eastman told the Star News that he had separated from his wife Crystal, Nia's mother, two months ago.
Nia was the couple's only child, but Eastman had two other children from a previous relationship.
'He was having mental issues. Him and his wife split up. It wasn’t a good situation,' she said.
Records show that he was also in court as recently as Wednesday. He was charged on August 26 with a domestic assault on his estranged wife.
At a press conference on Thursday, RCMP Inspector Jennifer Ebert broke the news of Nia's death.
'Leave me alone, I've had enough': Chilling final Facebook post of dad who murdered his seven-year-old daughter before committing suicide Ashley Collman Dailymail.com 11 Nov 2016