Actually, I believe that is the case, although the charge pales in comparison to murder. IANAL, but the Green River Killer was convicted of contaminating a crim

Actually, I believe that is the case, although the charge pales in comparison to murder. IANAL, but the Green River Killer was convicted of contaminating a crime scene because he left false evidence to throw off investigators. From that, it appears that intentionally tampering with evidence of a crime - even if you created it - is illegal.