Olivia Blackmer spent five days fighting for her life after she was shot by her mom in a horrifying murder-suicide that saw her three sisters shot dead but succumbed to her traumatic brain injuries on

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.

The 7-year-old surviving sister of a Wyoming mom's murder-suicide that killed her three young siblings has also died. Tranyelle Harshman shot her four daughters on Monday, Feb. 10.

A seven-year-old girl who was shot by her mother during a murder-suicide that killed her sisters at their Wyoming home has died. Olivia Blackmer fought for her life for five days before she died from the traumatic head injury she suffered in the shooting rampage.

The dad of a seven-year-old girl who tragically died after suffering a traumatic head injury has opened up about his loss and has spoken about the 'peace' that he has been able to find

Olivia Blackmer and her three sisters were shot by their mother, Tranyelle Harshman, in their Byron, Wyoming, home Feb. 10 before Harshman turned the gun on herself, according to the Big Horn County Sheriff's Office. Brailey, 9, Brooke, who was almost 3, and Jordan Blackmer, 2, all died at the scene.

Olivia Blackmer, seven, was shot by her mother Tranyelle Harshman, alongside her three sisters, but had been fighting for her life in hospital before tragically passing away

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The 7-year-old girl shot in the head by her mother during a murder-suicide that killed her sisters has died after five days of fighting for her life in the hospital. Olivia Blackmer died at Primary Children’s Hospital in Salt Lake City on Saturday afternoon,