The Brooklyn District Attorney will launch an investigation into a botched raid by New York City police following accusations by the Brooklyn family involved that it led to their father suffered a fatal heart attack.

WABC-TV reported that 43-year-old Carlos Alcis died early Thursday morning after police entered his family’s home allegedly looking for a suspect in a street attack in the area. Two of Alcis’ sons were questioned but not charged in the incident.

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According to authorities, Alcis opened the door for them to enter, a story his family denied at a news conference Saturday alongside both their attorney and MSNBC host Al Sharpton.

“What happened, what’s going on? Is that legal, to go in somebody’s house without a warrant?” his brother Rudy Alcis told WABC.

Alcis’ family said he collapsed and went into seizures shortly after police entered. One of the victim’s sons, Imaunel alcis, told NY1 that one officer started pumping his heart and asked him to perform CPR, which runs counter to police reports saying officers assisted him.

“With more than 10 police officers inside the house, my nephew here had to call 911 for my brother,” Rudy Alcis said to NY1. “And when paramedics arrived, they tell them, ‘Sorry for the loss.'”

It also took paramedics 20 minutes to reach Alcis’ home, despite it being near at least one hospital. The head of Uniformed Paramedics, the amblance company that responded to the call, told WABC that it was initially given the wrong address.

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Watch WABC’s report, aired Saturday, below.