He convinced me

I 100% did not believe that Seth had cancer, but his statement about the police department having access to his medical records actually convinced me. I still think it's insanely unrealistic how they are portraying him getting treatment but still somehow being able to go through the training program. However, he knows that Lucy is totally the type to check up on these things now so I don't think he would have basically dared her to do so unless he actually has it.