Investigators are working 18-hour days as they scramble to find a toddler who was last seen Wednesday morning at his home in Savannah, Georgia, Chatham County police said.“We’re looking at it from multiple fronts, one of it being a criminal investigation as well as a missing child at this point,” Chatham County Police Chief Jeff Hadley said at a Monday news conference.“We don’t have anything confirmed so can’t say anything absolutely, but it is fair to say that our efforts in the cooperation with the FBI and them providing an abundance of resources to us that we are looking at the criminal aspect of it.”No suspects or persons of interest have been named as of Monday afternoon, but “everyone is being looked at,” Hadley said.Hadley would not comment on family cooperation in the investigation, where the toddler’s family was Monday, or on the family’s lack of public appearances since Simon was reported missing.Police are working to verify the accuracy of tips submitted over the weekend via a tipline, Hadley said."