The Albany Park apartment where a 10-year-old girl died had a malfunctioning boiler and lacked carbon monoxide alarms and smoke detectors, the Chicago Department of Buildings found. Chicago firefighters detected high levels of carbon monoxide in the apartment Monday morning. Jayrinne Sequeida was found unconscious and not breathing about 5:30 a.m. in the 3000 block of West Gunnison Street. Her 12-year-old sister was also taken to the hospital in serious condition. She was out of the hospital as of Tuesday, Joseph Marquez, a longtime family friend, told the Sun-Times. Jayrinne was pronounced dead in the emergency room of Swedish Hospital, according to the Cook County medical examiner’s office and Chicago police.Jayrinne's parents, Victor Sequeida and Maribel Sequeida, had repeatedly complained to their landlord about a number of issues with the apartment, including the lack of carbon monoxide alarms, Marquez said. They were planning on moving out soon. The Buildings Department cited the three-flat apartment building for 11 code violations. The third-floor unit where the girl lived and the basement did not have carbon monoxide alarms or smoke detectors, according to the report. The report also cited the building's "malfunctioning" boiler and said the fire department shut off the boiler and the building's gas supply. The inspection also found the building had exposed and shorted wiring, which it called "dangerous and hazardous." There were also fractures and loose and eroding mortar in the building's chimney.The apartment building had a “do not enter” notice from the Chicago Department of Buildings posted on the front door Monday morning warning of "dangerous and hazardous conditions." Authorities closed an apartment building in the 3000 block of West Gunnison Street after paramedics called to the building detected high levels of carbon monoxide, authorities said, Monday, Jan. 13, 2025. Police and fire officials said a 10-year-old girl died and a 12-year-old was hospitalized in serious condition after being found in the Albany Park neighborhood home with elevated carbon monoxide levels. | Ashlee Rezin/Sun-TimesAshlee Rezin/Sun-Times Homes legally must be equipped with carbon monoxide alarms and smoke detectors. Landlords are responsible for providing and maintaining carbon monoxide and smoke alarms in their rental units.One of the building's owners, Steven Trevino, declined to comment Tuesday on why the unit lacked the detectors and what was wrong with the boiler. The building's other owners, James Beck and Kathleen Beck, did not immediately return a request for comment. A GoFundMe for Jayrinne's family had raised over $9,800 of its $15,000 goal by Tuesday evening. The family had gone to a clinic on Sunday after feeling ill, Marquez said. Their symptoms included vomiting and headaches. But they were told they just had a virus, Marquez said. They went back home, and Maribel Sequeida woke up in the middle of the night to check on her daughters, Marquez said. That's when she found Jayrinne wasn't breathing. Her death has devastated her tight-knit family, Marquez said. He's known them for 10 years. Their families just spent Christmas Day together. "I don't think anyone could ever recover from this. Especially since this whole situation could have been avoided," Marquez said. Jayrinne loved dance, soccer and helping out her mom. She and her big sister were best friends, Marquez said, and she got along well with his three young kids. The families would often go to the park together. "For landlords and tenants, I want them to be aware these alarms can save lives, especially for the little ones," Marquez said. At the scene, firefighters detected high levels of carbon monoxide at 300 parts per million, Chicago Fire Department spokesperson Larry Langford told the Sun-Times Monday. “A carbon monoxide detector will trip as low as 10 ppm, which would give you plenty of time to fix the situation and get out,” he said.Langford said carbon monoxide poisoning is fatal when the strength of the gas is high and the duration of the exposure is long. “For instance, a 1,000 ppm reading could be fatal in 30 minutes or less, and down to 300 it will take a couple hours at least,” he said. Rhoda Maliet lives on the first floor of the building with her family and was awakened by police early Monday. "They knocked on our door and told us, 'You need to get out, there's a gas leak, and the carbon monoxide is too high, and it killed a little girl,'" Maliet told the Sun-Times on Tuesday. On Saturday, the carbon monoxide alarm in Maliet's apartment went off. She thought the battery in the alarm had died. "I didn’t know the dangers of carbon monoxide until this. I didn't know it could be deadly," Maliet said. "The police told me, 'You are lucky because on Saturday, the carbon monoxide was high in your building.'" Maliet, who has lived in the building for 13 years, said this was the first time a major issue has happened. "It's just very, very sad," Maliet said. "They're a very nice family, and those little girls are so sweet."