Wayne Levinson is a petty criminal known for burglaries who is known by the alias of "The Snail". Despite his alias, however, he was ironically very fast.
In the Season Finale Honor Thy Father (episode), Wayne entered the Green Star restaurant, with NCIS being ordered to stake him out and arrest him. It was believed that he had been planning to rob the store, although it was later revealed that he had actually been hired via the imprisoned former Mexican Director of Justice Alejandro Rivera to deliver three unregistered glocks for assassins that had escaped a ship. Wayne Levinson was initially reluctant to give out the information due to the risk of being killed by his employer if he talked, but eventually relented when Special Agent Anthony DiNozzo, during the interrogation, inferred that his employer would probably kill him anyways for being a loose end. The information supplied (especially the identity of his employer) was unexpected enough that Anthony DiNozzo ended up breaking protocol secretly by contacting Leroy Jethro Gibbs to inform him about the development (as NCIS Director Leon Vance had earlier given strict orders to DiNozzo and the other members of the Major Cases Response Team to not contact Gibbs under any circumstances, even relating to the case, due to wanting to give Gibbs time to grieve for the then-recent passing of his father, Jackson Gibbs).