Detailed Instructions: In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.
Q: Passage: Archie Moses is a small-time thief in Los Angeles who smuggles drugs for drug lord Frank Colton, who launders his drug money through a car dealership. Moses is unaware that his best friend, Rock Keats, is actually LAPD undercover cop Jack Carter, who befriended him only to infiltrate Colton's gang.
Carter has Moses include him in Colton's next drug shipment, secretly planning to arrest Colton and take in Moses, whom he has come to care about, unharmed. Carter's undercover status is revealed before he can enact his plan, however, and a hurt Moses pulls a gun on him. During the raid on Colton's warehouse, an out of control crane hits Moses in the back, causing him to accidentally shoot Carter in the head. Moses then flees the state, and is subsequently found and arrested.  
Carter miraculously survives and makes a full recovery with the aid of his physical therapist, Dr. Traci Flynn, with whom he falls in love. Moses is brought into custody, and he agrees to testify against Colton, but the trial is set to take place at the other side of the country. Carter's superior officer, Capt. Jensen, orders him to personally transfer Moses to the courtroom.
Carter harbors resentment against Moses, and tensions escalate once the simple transfer goes awry. Colton learns through bribed federal agents and LAPD officers of Moses' attempt to testify against him. As they flee from Colton's men, Carter and Moses slowly mend their friendship, and are successful in returning to Carter's precinct. However, Colton apparently holds Flynn hostage, and blackmails Carter into turning Moses over in order to save Flynn.
A:
What is the last name of the person that the undercover cop has come to care about?