"I have an idea where he is but I don't really know where he is," Jon tells Et's Jennifer Peros. The former Jon & Kate Plus 8 star goes on to say that while his ex-wife, Kate Gosselin, "says that Collin is in a special school for special needs kids with behavioral problems,” Jon claims he has been told otherwise by law enforcement officials.
In August, Kate revealed that she enrolled Collin -- one of the divorced couple's eight children together -- in a program away from home to help him cope with "special needs." Collin does appear in the the new Kate Plus Eight trailer that debuted late last month.
Watch: Exclusive -- Jon Gosselin Talks Estrangement From His Kids -- 'I Haven't Seen All 8 of My Kids Together in 3 Years'