Updated

A former Pennsylvania prosecutor says she tried unsuccessfully to prosecute a man for slashing his girlfriend's throat four years ago and was sickened to learn he killed her and their son last weekend.

The Citizens' Voice of Wilkes-Barre reported Wednesday (http://bit.ly/2ggQt3Z ) that former assistant district attorney Alexis Falvello was pursuing the case against Zackary Yashkus in 2012, but two district judges threw out the charges when the victim wouldn't testify.

Police say the 23-year-old Yashkus killed 21-year-old Sharae Thompson and their 3-year-old son before killing himself Saturday.

All three died of gunshot wounds to the head.

Falvello says prosecutors were concerned about Thompson's safety and attempted to pursue the case without her. After a district judge dismissed the case, they tried again, but it was again thrown out.

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Information from: The Citizens' Voice, http://www.citizensvoice.com