A deranged illegal immigrant stabbed his upstairs neighbor 50 times inside their Long Island apartment building – all because her high heels made too much noise, prosecutors said Tuesday as he pleaded not guilty to slaughtering two women.
Rony Yahir Alvarenga Rivera, 22, allegedly told cops that he first hacked neighbor Eddy Raquel Hernandez Castillo to death on April 30 because the racket she made drove him nuts inside his basement apartment.
“He told her he was annoyed by the noise that she was making, wearing high heels and talking loudly on the phone,” Nassau County District Attorney Anne Donnelly told reporters. “When he was arrested, his clothes were full of blood.”
Rony Yahir Alvarenga Rivera, 22, at his arraignment hearing in Mineola on June 2, 2026 for for the alleged murders on Long Island. Dennis A. Clark for NY Post
Rivera allegedly stabbed his upstairs neighbor 50 times in April. Nassau County Police Department”He gave a confession to not only the Lynbrook Police Department, but he waived Miranda [rights] and he gave a full confession to the Nassau County Police Department,” Donnelly said.
Rivera, an immigrant from El Salvador, entered the US illegally as an unaccompanied 12-year-old in 2016, according to federal authorities.
Nassau prosecutors said the accused killer later told detectives that he knew he would get caught after the grisly slashing – so he planned a second fatal attack.
Shortly after midnight on May 1, Rivera allegedly drove to his job at a Lynbrook Wendy’s and waited outside by a dumpster for nearly a half hour before he ambushed coworker Ana Maria de Aguila Cordova, a 42-year-old mother of three, when she came out to take out the trash.
Rivera allegedly murdered his neighbor because of the sound her high heel shoes bothered him. Dennis A. Clark for NY Post
Family members of one of the victims arriving at the court house for Rivera’s arraignment. Dennis A. Clark for NY Post
The Valley Stream house where the murder took place. Gregory P. Mango for NY PostRivera had a “beef” with Corodova and felt “disrespected” by her, and stabbed her upwards of 30 times during the bloody assault, the DA’s office said.
The maniac then called the cops on himself from a 7-Eleven in Lynbrook shortly before 3 a.m. and allegedly told police, “I killed someone tonight.”
Rivera then allegedly confessed to both slayings, but pleaded not guilty as he was arraigned on first-degree and second-degree murder and other charges in Mineola court on Tuesday.
He was ordered held without bail and is due back in court on July 8.
