Torres recognizes nearby tire marks as belonging to a dirt bike and the small truck it was loaded onto.
Why is he so certain?
Because its his bike!

Credit: Sonja Flemming/CBS
Torres wants to leap directly into the case, but Gibbs frustrates him by keeping him sidelined.
Also frustrated are Palmer and Ducky, who cant identify the substance under Campbells fingernails.
(We also get another shot of the head wound.
They must be really proud of that makeup effect.)
Then he tells Gibbs to deliver a message to Nick Medina (a.k.a.
Torres undercover identity): Im not gonna be in here forever.
But Torres has no interest in hiding and approaches Vance to ask to be put in the game.
Still, Torres knows one way to help.
He heads home for his notebooks and finds that someones placed his dirt bike in his garage.
When he approaches it cautiously, it explodes.
(Given their presence on the endangered species list, shes grateful that didnt actually happen.
And oh yeah, shes glad Torres didnt blow up, either.)
She vows to use the burner phone detonator to locate the incoming call.
(McGee declares it every mothers worst nightmare, and hes not wrong.)
As much as I love her, I dont see it.
Layton greets Torres at the door and chides him for not visiting the way he said he would.
Everybody has secrets this season!
At HQ, Abby worked her magic and tracked the detonation call to Marcels house.
When the team kicks down the door, they find Marcel dead in his bed alongside another man.
This, apparently, was the secret Layton knew.
At this point, shouldnt he start suspecting Layton, who literally just threatened him with the same thing?
Oh, and the unidentifiable stuff under Campbells fingernails was also on Marcels boots.
Also, we getyet anothergood look at a gunshot wound to the head.
When Gibbs and Torres enter the Elevator of Schemes and Secrets, the boss man hits the emergency button.
Do you think the elevator operator people no longer call to confirm everythings okay when this happens?
Oh, the NCIS elevator stopped again?
Let it go, Hank.
Somebodys having an important, private conversation.
Itll start up again in a few.
Torres has zero regrets, although he would like Gibbs to assure him that his job isnt in jeopardy.
But… but Gibbsencouragedhim to do it!
But the feds came with Torres, whos prepared to face the consequences of his actions five years ago.
Gibbs follows in his sedan until Layton darts off the road.
Then its Torres to the rescue!
Torres executes a jump that lets him pull ahead of Layton and kick him off his bike.
You forgot these, he says, brandishing the cuffs.