The slain cop’s cousin said the Monday evening shooting by rifle-toting maniac Shane Tamura also rattled Islam’s pregnant wife, who was rushed to the hospital by police Tuesday morning.

“They are all crying,” cousin Muhammad Mainul Islam said. “There is no brother — only him. The family is really feeling a big problem. His wife had the doctor’s appointment. I heard one police officer from the precinct, she took [her] to the hospital.

“His father went last night to see him,” he added. “When he heard the message, he had a stroke, feeling bad. So he had a stroke so the hospital did not release him.”

Didarul Islam, a married father of two, was among four people shot dead by Tamura at the 44-story Park Avenue building around 6:30 p.m.

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Police said Tamura, 27, drove from Las Vegas to target the NFL’s headquarters, killing Didarul, a security guard and a Blackstone executive in the lobby before taking the elevator to the offices of Rudin Management, where he killed another person. He then turned the gun on himself.

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