Does anyone know which episode is this...

As far as I remember, Ayumi and Haibara were sitting in a car with the other detective boys (I think)and Haibara told Ayumi to hide from the murderer because he might recognize her and Ayumi a dit if she keeps on hiding she'll never win, ou something like that....

I think it was the episode where Ayumi collided with a murderer and when she fell there was a mark on her hand from the car keys of the murderer. I'm not sure but isn't that the episode where we're told Sato's car's brand?

May anyone please please tell me the number of the episode ou its title? And if toi think finding an answer will require toi a lot of research toi might as well ignore that I asked this question and continue doing what toi were doing, I don't want to waste your time. Thank toi in advance.

(And sorry for the long question :$)