Suspect Identified in Two Nassau County Fatal Stabbings
Nassau County police have identified Rony Yahir Alvarenga Rivera, 22, as the suspect accused in two fatal stabbings that happened hours apart in Island Park and Valley Stream, according to News 12 Long Island.
The case has drawn heavy regional attention because police say the two women were killed in separate Nassau County communities within the same overnight period. The first reported scene was a Wendy’s restaurant on Austin Boulevard in Island Park. The second was a residence on Mineola Avenue in Valley Stream.
Police say Alvarenga Rivera is facing multiple murder charges and has pleaded not guilty, News 12 reported.
Island Park Wendy’s Stabbing
According to News 12, police responded to a Wendy’s restaurant on Austin Boulevard in Island Park shortly after midnight Friday. Investigators said a 42-year-old woman, described as Alvarenga Rivera’s coworker, was stabbed and killed while taking out the garbage behind the restaurant.
News 12 reported that investigators said Alvarenga Rivera later called police and told them he had stabbed someone.
Det. Lt. George Darienzo told News 12 that while police were at the scene, they received information that a person had been stopped at 169 Atlantic Avenue in Lynbrook.
“He asked to see police and when police arrived, he said he killed somebody that night,” Darienzo said, according to News 12.
Alvarenga Rivera was arrested outside a 7-Eleven in Lynbrook, News 12 reported.
Valley Stream Investigation
Police said the second fatal stabbing happened on Mineola Avenue in Valley Stream a few hours later, according to News 12. Investigators said a 32-year-old woman had stab wounds to the neck and torso.
News 12 reported that police said Alvarenga Rivera and the Valley Stream victim lived at the same location. Darienzo described the home as a shared living arrangement where occupants rented bedrooms and used common spaces including a living room, kitchen and bathroom.
“So they cohabitate, acquaintances of one another,” Darienzo told News 12. “I’m not aware of a specific domestic relationship between the two.”
The identities of the victims were not included in the News 12 report reviewed by Long Island Traffic.
Earlier Reporting Said One Suspect Was in Custody
Patch reported Friday that Nassau County police said one suspect was in custody after incidents in Island Park and Valley Stream, citing the NCPD Homicide Squad. At that point, Patch reported that police had not yet released the suspect’s identity or detailed charges.
News 12 later identified the suspect as Alvarenga Rivera and reported that police connected him to both fatal stabbings.
Why Long Island Traffic Is Covering This Story
Long Island Traffic primarily covers road safety, crashes, transit disruptions and commuter conditions. This case falls into a broader public-safety category because it affected multiple Nassau County communities, involved a major police homicide investigation, and became one of the most-searched Long Island crime stories of the weekend.
The locations are also high-traffic community corridors. Austin Boulevard is a major Island Park route connecting the Long Beach barrier island area with mainland Nassau County. Valley Stream sits at the Nassau-Queens border and is one of the busiest commuter gateways on western Long Island.
Major police incidents in these areas can affect local traffic patterns, business access, public transit decisions and community safety awareness.
Current Status
As of the latest News 12 report reviewed by Long Island Traffic, Alvarenga Rivera had been charged in connection with the killings and pleaded not guilty. Police statements and court records may add further details as the case proceeds.
All criminal charges are allegations. A defendant is presumed innocent unless and until proven guilty in court.
Long Island Traffic will update this report if Nassau County police or prosecutors release additional public information about the case.
This report is based on public reporting from News 12 Long Island and Patch. For official updates, consult Nassau County Police Department releases and court records.