"El Diablo" is the third episode of the American television drama series The Killing, which aired on April 10, 2011 on AMC in the United States.
Principal Meyers (Kerry Sandomirsky) unlocks a room adjoining The Cage to which only she and school janitor Lyndon Johnson Rosales have a key.
Later, Oakes (Garry Chalk) asks Sarah to remain on the job through the end of the week because he feels that Holder isn't currently capable of controlling the case.
When she notices a teen-themed porn magazine on the floor, Rosales (VJ Delos Reyes) comes up behind her and slashes her arm with a knife.
While a medic stitches and bandages Sarah's arm, Holder lists the suspect's priors: indecent exposure and "kid diddlin'."
At a street basketball game to promote an anti-gang initiative, Richmond mentions the endorsement leak to Jamie, who blames the cops and then Yitanes, adding that everyone is playing both sides.
In Richmond's office, Jamie comes up with a plan to win back Yitanes's endorsement by offering her husband a city plumbing contract.
She later officially endorses Richmond during a press conference as Jamie quietly leaves the office with a box of his belongings under his arm.
Holder tells Oakes and Sarah about Kris (Gharrett Patrick Paon), a runaway expelled from high school and Jasper's best friend.
She whispers, “El diablo.” While visiting the Larsens, she reveals that Rosie's cause of death was drowning, then learns that Kris lived nearby until three years ago.
At the police station, Kris's mother admits to Holder that she gave up on her son, adding that he mainly hangs out at a skateboard park.
Watching from a distance, Sarah notes to Holder that Rosie wouldn't have entered The Cage with Kris, but would have with someone she trusted, “like Jasper.” Inside, after confiscating a cell phone from a student, a teacher (Brandon Jay McLaren) later hears it ring.
Club rated this episode a B, saying "So far, The Killing doesn’t offer much variety in terms of mood; it’s pretty much unrelenting gloom, with some moments of overwhelming menace thrown in for good measure.
"[2] TV Fanatic's Teresa L. rated the episode 4.5 out of 5 stars and stated "Although the format of The Killing will make it difficult to keep the ideas fresh and the plot developments realistic, the show still retains its authentic feel without becoming tiresome and boring.