Olivia was shot in the head by her mother, Tranyelle Harshman, 32, at the family home in Byron, Wyoming , on Feb. 10, in a murder-suicide rampage in which the mom also killed her 9-year-old sister, Brailey, and her 2-year-old twin half-sisters, Brooke and Jordan, before turning the gun on herself.

Olivia Blackmer, 7, was the lone survivor of a Feb. 10 murder-suicide in Byron, Wyoming, by which her three sisters and mother died last week.

Harshman was found in her bedroom with a gunshot wound to the head but was still breathing when officers entered.