An Alabama teen hospitalized on Sunday after what police describe as two years isolated in his parents' basement remained in critical condition Wednesday in a Shelby County hospital.

The 14-year-old, who Helena Police Chief Pete Folmar described to WVTM in Birmingham as "severely, chronically malnourished, dehydrated, suffering from acute respiratory distress, shock, hypothermia," and being "close to death," was hospitalized on Sunday. His adoptive parents, Richard Hobson Kelly, 56, and 47-year-old Cynthia Rogers Kelly, were taken into custody that same day.

"The child remains gravely ill at this time and faces a long, difficult recovery and uncertain prognosis," Folmar told local media.