According to the Earned Income Credit table and calculator, you should receive approximately $3000 to $3500 back on your return. Of course, the calculators are only rough estimates. It will depend on how much you paid in taxes, and whether or not you have any itemized deductions.
It depends on what the two defendants are charged with and how long they will be incarcerated if they are found guilty. Also if they are found innocent and have decent attorneys your defendants may eat up a considerable amount of money in legal fees. If your defendants are being tried together it will be less than if they are having separate trials. Seeing as it is the "job" of every criminal to find money or assets that aren't theirs and steal them, I would say that the likelihood of your $9,000 a year providing you any kind of security with known criminals in your midst is highly unlikely.