Continuity mistake: Nick drags Nathan out from the silo where they are hiding twice.
Continuity mistake: The scenes of OA and Maggie chasing McGowan are a mess. The distances between the agents and the perp vary greatly from moment to moment and OA is going over the same fence twice.
Continuity mistake: The two FBI agents are searching for the wounded perp and track him to a veterinarian's-the woman working in the office is ordered to the ground and lays down in front of office chairs very close to large animal cages by her head. In the next scene when she is ordered to her feet, the cages are nowhere near her.
Liar's Poker - S3-E3
Other mistake: Her name in the show is Elise Taylor, but on a badge in her car it's Elise Smith.
Factual error: The digital time zone clock on the wall in the FBI operation center is wrong. The show is set in NYC, which is Eastern Time. The clock shows EST at 16:44 and ZULU time (UTC / GMT) at 20:44. The difference between EST and ZULU time is 5 hours, so the clock should show ZULU time as 21:44. Plus, the times for the other time zones on the clock are wrong by an hour. (00:18:29)
Answer: Felix Serrano was the biological son of Antonio Vargas, the leader of Durango Cartel. Miguel Rojas (has 2 priors in cocaine distribution, and he launders money), was a Lieutenant with the Durango Cartel, and he worked with Felix Serrano. As for the motive, Miguel shot Felix (his actual target) because they had a falling out, which was presumably drug related, and the four other men at the poker table were just collateral damage (Miguel attempted to make it look like robbery). Later, when Miguel was in Antonio's car wired up with the FBI body cam, Antonio states, "Felix said that things were not going well between the two of you." So Antonio knew Miguel murdered his son Felix. At the end of the episode, after Rina's press conference, note one of the reporters even asks, "What was the motive for the 5 murders?"
Super Grover ★