Crime Man Who Fathered Former High School Teacher's Son Allegedly Kills Them Both: Source A former high school teacher's former student and lover has been accused of killing both her and their young son, according to an N.Y.C. police source By Chris Harris Chris Harris Twitter Chris Harris has been a senior true crime reporter for PEOPLE since late 2015. An award-winning journalist who has worked for Rolling Stone and MTV News, Chris enjoys prog rock, cycling, Marvel movies, IPAs, and roller coasters. People Editorial Guidelines Published on December 27, 2016 04:18 PM Share Tweet Pin Email Photo: Source: Felicia Barahona/Facebook A former high school teacher’s former student has been accused of killing both her and their young son — born from an affair that made headlines in 2013 — a New York City police source tells PEOPLE. An NYPD spokesperson declined to comment on the case, but the department source says Isaac Duran was charged Tuesday with two counts of murder in the deaths of former Dewitt Clinton High School teacher Felicia Barahona and her 4-year-old son, Miguel. The 36-year-old mother and Afghanistan War veteran was found dead Monday morning in the living room of her Manhattan apartment, according to the police source, who confirms that she was strangled with an electrical cord and Miguel was drowned in the bathtub. The boy was found face-down, floating in the filled tub, the source says. Their bodies were first discovered by the apartment building’s superintendent, who checked on Barahona after noticing a foul odor that seemed to be coming from her unit. Duran was taken into custody later Monday, according to the source. Under “intense questioning,” PEOPLE’s source alleges that Duran “owned up” to the killings — at one point “referencing Satan.” • Want to keep up with the latest crime coverage? Click here to get breaking crime news, ongoing trial coverage and details of intriguing unsolved cases in the True Crime Newsletter. Duran’s custody status was not immediately available Tuesday afternoon. It was unclear from court records if he had been before a judge yet, entered a plea to his charges or whether a bail amount had been set for him. It was unknown Tuesday if Duran had retained an attorney who could comment on his behalf. According to the NYPD source, Duran initially denied having any involvement in the deaths and told detectives he hadn’t been to Barahona’s apartment building since 2012, when their son was born. However, police discovered that Duran was spotted on surveillance video entering and leaving the building over several days. • Pick up PEOPLE’s special edition True Crime Stories: Cases That Shocked America, on sale now, for the latest on Casey Anthony, JonBenét Ramsey and more. Barahona’s relationship with Duran first became public in March 2013, after an internal investigative report was obtained by multiple local news outlets. According to those reports, Barahona began having sex with Duran after he turned 18, though they later split in early 2012 before Miguel was born. Barahona was fired from Dewitt Clinton High in August 2012. Her family could not immediately be reached.