<Tr> <Td_colspan="2"> Law & Order: Special Victims Unit character </Td> </Tr> <Tr> <Th> First appearance </Th> <Td> "Payback" (season 1) </Td> </Tr> <Tr> <Th> Last appearance </Th> <Td> "Chasing Demons" (season 19) </Td> </Tr> <Tr> <Th> Portrayed by </Th> <Td> Dean Winters </Td> </Tr>

Why did detective cassidy leave law and order