New details are emerging about a grisly murder case.

Investigators looking into the murders of Jilian Kelley, 39, and Veronica Butler, 27, whose bodies were found in a freezer in Oklahoma two weeks after they were reported missing in March, are saying they now believe the women were killed to put an end to a custody battle involving a paternal grandmother, CBS reported citing court documents.

But while the investigation continues, Kelley’s probable cause of death has been confirmed.

According to a medical examiner’s report seen by E! News, her death was due to “multiple sharp force trauma” while the manner of death was noted as homicide. Per the report, Kelley’s body had nine stab wounds and seven incised wounds, two of which “were consistent with Mrs. Kelley having attempted to defend herself.”

“Although possible stun gun marks were observed on the back on her neck and posterior left shoulder,” the report continued, “the decomposed state of her body limited definitive gross and microscopic confirmation.”