Javier had the unique feature of either being really young or just very short. (The actor's actual height is 5ft 4½ in /163.8 cm.)
While investigating the murder of Teegan Campbell (then known as Jane Doe), Debra learned from her CI, Anton Briggs, that Javier dealt with drugs and girls. At first reluctant to cooperate, Javier finally said that he had passed Teegan on to his friend, Freebo. (Debra threw him on the floor when he said he could get her a "thou[sand] a night.")
Javier was soon found dead with his skin peeled off, after a tree trimmer called it in. It was assumed that Freebo killed Javier. However, Dexter knew that he didn't because he himself had killed Freebo before Javier was murdered. The police began to find evidence that Freebo did not kill Javier or Teegan. Later, it was confirmed that Javier was killed by The Skinner.