Norberto Cervantes is a character in DEXTER. He was a professional assassin and hitman working for Carlos Guerrero, a notorious drug kingpin. Norberto was responsible for the deaths of Ricky Simmons and his wife Kara, due to Ricky being found out as an undercover police officer for the Miami Metro Police Department.
Cervantes was ordered to kill Officer Ricky Simmons when Guerrero found out he was an undercover officer attempting to infiltrate his organization. Cervantes followed through by throwing Simmons off of a freeway overpass. However, Simmons bit a chunk of flesh right out of Cervantes' arm.
After this, Cervantes inspected Simmons' phone and discovered that he had been in constant contact with his wife, Kara Simmons. To prevent her leaking any information to the police, Cervantes invaded the Simmons residence and shot Kara in the back, then made his getaway. However, the wound on his arm from where Simmons had bitten him left a drop of his blood at the crime scene.
Her illicit lover, Sergeant James Doakes, was motivated to investigate harder and he soon discovers Cervantes' DNA trail and Doakes arrests him. Lieutenant Maria LaGuerta offers Cervantes a more lenient sentence in return for providing evidence to convict Guerrero. Cervantes considers this, but before he can decide, Guerrero arranges for an assassin, disguised as a prison guard, to stab Cervantes in the jail's shower. Later, Kara dies from a massive heart failure by possible untraceable poison to tie up loose ends in the hospital.