(Preble County, OH)--An investigation is underway after a 12-day-old baby boy was found dead at a home between Camden and West Elkton in Preble County yesterday.  A man who called 911 said that the baby’s bassinet tipped over and that the infant suffered severe head trauma.  The baby was dead when first responders arrived.  "It's my understanding that the father and maybe another family member were at the house when the child was discovered to be unresponsive and the call to 911 was made," said Preble County Sheriff Mike Simpson.  The investigation is continuing Thursday pending an autopsy.  "We have not taken anyone into custody.  We've done some very preliminary interviews," Simpson added.  The baby’s identity has not been released.