He was immediately set upon and tied up. Then the assailants ordered the second teenager to attack the 30-year-old, and they joined in the beating. The beating lasted hours, the police said. The attackers forced the man to drink all 10 cans of liquor — each about twice the size of a can of beer, with a higher alcohol content, 10 percent to 12 percent, according to Four Loko’s Web site.

While the man was held captive and attacked, five of the Latin King Goonies went to his house, which he shared with his 40-year-old brother. Using a key taken from the 30-year-old to get inside, they found his brother in bed. They pulled a blanket over his head and hit him, demanding money. When he refused, one placed a cellphone to the brother’s ear, and he heard the voice of his younger brother, who said he had been kidnapped and who pleaded, “Give them the money.”

The brother complied. The men took $1,000 in cash, two debit cards and a 52-inch television.

The brother managed to free himself about three hours later, and he called the police, leaving out the fact that his brother was being held. By then it was Monday morning. Detectives went to the brothers’ home and, upon leaving, saw the 30-year-old, passed out on the landing from the alcohol he had consumed. But having no reason to believe he had been a victim of a crime, they did not question him.

Detectives returned later that day, suspicious of how the robbers had entered the brothers’ home without using force, and the 30-year-old told them he had been picked up in a van by strangers and forced to give them his keys and address, the police said.

Officers still had no idea about the first teen who had visited the hospital, because he had not called the police, and hospitals are not required to inform the authorities about assaults, the police said. The man had said he was robbed near 1910 Osborne, and police officers tried to obtain a search warrant for the house but were told they did not have enough cause, the police said.

Late on Tuesday the second teenager walked into a Bronx police station house and gave a version of what had happened, the police said. None of the three victims, in their first interviews with the police, were fully forthcoming, fearing reprisal and wanting to keep their lives a secret. But the second teenager gave an address, and a second request for a search warrant was granted.