Your argument is speculative. People can and do scrub crime scenes all the time. You're not allowed at a trial to speculate why certain evidence isn't present.

Trials don't work that way. The absence of evidence is not the evidence of absence. Murder cases don't always neatly follow the plot of law and order. Usually they only end up with some of the evidence they need. Sometimes barely any at all. You're a victim of what's been dubbed the CSI Effect. If what you said is…