Agree with Heinz. (and also with the guy with the Chinese name who is actually British :) ).
"In case of" means "in the event of," "if there is," and is used to refer to a potential event that is not expected to occur frequently.
Ex: "Please use the stairs in case of a fire" = "Please use the stairs if there is a fire."
"In the case of" is a way to bring up a matter as a topic for discussion.
Ex: "In the case of James, they decided to promote him to the next grade" = "With regard to James, they decided to promote him to the next grade"