According to Benton County Coroner John Hansens, 19-year-old Victoria Torres died of a gunshot wound to the neck.
Abigail Torres, 23-years old, also died of a gunshot wound to the neck.
David Saucedo, 22-years old, died of two gunshot wounds to the head.
Abigail Torres was pregnant with a near full term baby girl that did not survive her mother's death.
The coroner said the victims died at approximately 4 a.m., two hours before the bodies were discovered by a farm worker.
Officers said the vicitms were in the Umatilla County area just hours before their bodies were found in Benton County.
They said Victoria's body was found roughly 15 feet away from David and Abigail.
Officers have one person is in custody, who was arrested on unrelated charges, that they are questioning about the homicide.
They would not confirm if this person of interest is related to any of the victims.
Officers haven't said if the killings were gang related.
They said there are still multiple people they want to talk about the case.
Victoria Torres' Aunt Mona Fuentes said she wishes that the last time she saw her niece she would have warned her about the crowd she was hanging out with.
"I feel like if I would have said something to her and gave her a message, like don't hang out with those people then maybe she would still be here with us right now," siad Fuentes.
Police confirmed that all three victims knew one another, but could not say if the victims knew the suspects.
Fuentes said right now her family just hopes police find whoever did this, because the worst part is the unknown.
"Not knowing why, why did you do this to her and to Abigail and to David."
- Bud Clary Toyota of Yakima supports student attendance with bicycle give away
- Pilot escapes plane crash unharmed
- UK Parliament hit by cyberattack
- Early morning Tanglewood Apartment fire displaces multiple families
- Pasco Fire & Rescue train for distressed swimmer rescue
- First cannabis-infused massage studio opens in the Tri-Cities