SQL & PL/SQL

Hi There,

I am unable to figure why I am getting the below error:

[Error Code: 905, SQL State: 42000]  ORA-00905: missing keyword

Below is the SQL query:

select case_id from case_routing

        where to_state_id in (100012, 100015)

        and case when to_char(sysdate, 'fmDay') = 'Monday'

        then

                trunc(route_date) = trunc(sysdate-3)

        else

                trunc(route_date) = trunc(sysdate-1)

        end

Any inputs or suggestions will be greatly appreciated.

Thanks,

K