Ricardo is a member of Jose's gang, and is also Jose's second-in-command.
Not much is known about Ricardo before the infection, but it is probable that he knew Jose.
After the outbreak, he joined Jose's gang. When Duncan's group came upon the gang, Ricardo and Jose took Claire and Rosie hostage, demanding that Duncan hand over all of his group's supplies. Duncan refused, and Ricardo shot Claire in the back of the head while Jose snapped Rosie's neck. Because of this, Stan shot and killed Ricardo while Duncan shot and killed Jose.
After Ricardo killed Claire, Stan shot and killed Ricardo.
- Possibly many unseen people