<p>MIO -- Declaring their innocence to the end, Raymond and Donald Duvall were sent to prison until they die for the bludgeoning deaths of two southeast Michigan hunters 18 years ago.</p>
<p>Prior to the sentencing Thursday, family members of the victims -- best friends Brian Ognjan of St. Clair Shores and David Tyll of Troy -- told the Duvall brothers they had torn their loved ones from them far too soon.</p>