The key is for them to play nice with each other, and the answer isn't a one-way interface like IR, or an HDMI pass-through with multiple user interfaces layered on top of each other.

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Similarly, during the October 2002 Washington-area sniper investigation, the African-American man and boy ultimately accused of the crime reportedly were able to pass through multiple road blocks with the alleged murder weapon in their possession, in part, because police 'profilers' theorized the crime had been committed by a white male acting alone.

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The rifle cartridges were steel-core rounds, which are more likely to pass through a body intact and can cause multiple wounds, Fyles testified.

CNN: STORY HIGHLIGHTS

Matthew Fyles testified the .223 cartridges were steel-core rounds, which are more likely to pass through a body intact and can cause multiple wounds.

CNN: STORY HIGHLIGHTS