You are right to not feel comfortable--you should NOT do this. The declaration could be used as evidence of your fault, and therefore guilt, in the criminal case and could therefore undermine your attempt to defend yourself. When you have a criminal case open against you, you can't say, write, sign, etc. anything that either directly or indirectly implicates you. If you have insurance (as you evidently do), let you insurer deal with this for you while you maintain your innocence.