cod develops over time, from an enforcement perspective, a rapid assesment of the situation may lead to a level of response based on perceived threat.

an experienced or well trained LEO may see a subtle detail indicating involvement, or not of other person, setting the tone for investigation or threat response.

an autopsy may turn that around if it ends up that a weapon was held in a position quite unlikely for decedent to achieve.

the overarching consideration is a planned murder is not in any way beneficial to boeings situation