If Li Jinfang said he had already killed the three people who caused Zhou Lizhe's death, things would become problematic, as Gao Yang would still have to figure out how to establish a new target to attract Li Jinfang's hatred.
If Li Jinfang said he had not killed them yet, that would also be problematic because finding three people in a strange city is far from simple. Nevertheless, Gao Yang still hoped Li Jinfang had not succeeded, because focusing all of Li Jinfang's attention on the direct killers was much easier than transferring his hatred to a contrived target.
After mulling over it for a long time, Gao Yang finally asked the question he cared about, and sure enough, Li Jinfang clenched his fists again and said emphatically, "No! When the gunshot sounded, I saw her hit the ground. I panicked then. The woman who fired the shot meant to hit me, but she missed."