Niagara Gazette — Investigators have said they are convinced that Freeman was the killer and Best only helped to dispose of Tennant's body.
It's believed Freeman may have provided some motive for the killing in a statement he made to Falls Police detectives. Both detectives and prosecutors have declined to comment on the motive for the murder.
An autopsy on Tennant's body, conducted by the Erie County Medical Examiner, concluded the cause of death as "asphyxiation due to mechanical obstruction of (her) airway and compression of the neck."
In a statement released by Falls police after the teens were charged, detectives said, “At this time we believe Freeman killed Isabella with his bare hands." Investigators also said there were some signs of "trauma" on Tennant’s body, but “no evidence of sexual abuse.”