Andrej Stoilovski

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Dear all,
I am kindly asking you to help me get the answer of one question. 
Is it possible a high blood concentration to an object to destroy the DNA profiles (from other person) left on it, before the same object was covered in blood?
It is very important for me to receive this information, because an innocent person may be accused for a murder that was not committed and is actually a suicide.
Thank you in advance for your answers.
I wish you all the best.