Authorities remove 16 children aged 1½ to 18 from a Hamden home after discovering them confined in a small room amid human waste.Investigators say the children have been hidden for nearly four years and include several who cannot speak and none who were enrolled in school.Four adult relatives — Gary Siders Jr., Gary Siders Sr., Christina Siders and Elizabeth Siders — are arrested on child endangerment charges and plead not guilty, with bonds set at $300K each.Seven children require hospital care, including air evacuations to level 1 trauma centers and one intensive care admission, and a state child welfare agency has taken temporary custody while investigators review past reports.