A Fort Worth father who had recently been hired to work as a Child Protective Services investigator killed his two young children and sister-in-law before killing himself Monday, authorities said.

Officers found the four bodies around noon in the 2000 block of Speckle Drive in North Fort Worth.

The Tarrant County medical examiner's office identified the homicide victims as Melinda Mercado, 45; Alyssa Parra, 4; and Michael Parra, who was a month shy of his second birthday. Each died of multiple gunshot wounds.

Police said Ronald Parra, 32, shot Mercado and the two children before killing himself.