One of the men hit Jose over the head with a bottle, and the driver of the car swung an aluminum baseball bat at his head, the police said. He fell to the floor as the three attackers, who were black, continued kicking and punching him, the police said. The beating ended only when Romel held up his cellphone and said he was calling the police.

On Tuesday, the police released a description of one of the men, saying he is 6 feet tall and thin, and wore a black leather jacket, boots, dark jeans and a dark baseball cap during the attack. The authorities said they did not have the license number of the car. The reward for information was set at $22,000.

Julia Osman, who worked with Mr. Sucuzhanay, visited him at the hospital on Monday. His face was so swollen that she could not see his eyes, and his head was wrapped in bandages. “He was kind, and cared about everyone who worked with him,” she said.

In the decade he has in the United States, Mr. Sucuzhanay rose from waiter to business owner. He got his real estate sales license three years ago, according to state records, and later started two companies and became the owner of several buildings, according to friends and public records.

“He was happy to have his own business,” said Cesar Alvarado, who owns a metal shop in Bushwick. Mr. Sucuzhanay’s office was a tenant of his, Mr. Alvarado said. “It was going well for him.”

Mr. Sucuzhanay, 31, well known in the local community. Herbert Velez, who worked with him to find an affordable apartment, said: “He works with everybody around here. He found a lot of people homes. He does whatever it takes to help someone.”