Detectives are still seeking the two other people believed to have helped Mr. Mejia-Ramirez leave Ms. McHenry in the spot where she was found, the official said. Detectives have only nicknames and physical descriptions for those individuals, the official said.

Maya McHenry, Lyric’s sister who celebrated her birthday with her the night before she died, said in a text message that she had never met Mr. Mejia-Ramirez and did not know if he was friends with her sister.

The Times profiled Ms. McHenry earlier this month:

In life, Ms. McHenry was a young woman who people felt was going somewhere. Friends and admirers watched her from afar, waiting to see what she would become: maybe a screenwriter or a movie producer, a reality star or a politician. She was at a moment of bright possibility, with all the avenues of a successful life branching before her.

The profile went on to say:

The spotlight on Lyric McHenry in life had meant that she was on the verge of becoming someone, but the spotlight on her in death seemed to foreclose all those possibilities. In the headlines and stories that followed, she was reduced to the facts as written in a hurried police report: black woman, pregnant, possible cocaine, deserted street in the Bronx. What more could there be?

Mr. Mejia-Ramirez has not been charged with causing Ms. McHenry’s death. The city medical examiner’s office, in ruling her death an accident on Wednesday, found she died from an overdose of cocaine, alcohol and heroin. Preliminary tests also revealed she was 20 weeks pregnant, though her friends and family maintain she had been unaware of the pregnancy.

The young woman was raised in West Hollywood, Calif., by parents who worked in the film industry. Her father was a movie director and a producer, and her mother was a wardrobe stylist. She moved in elite circles and played a role on a reality television show. She was charismatic and glamorous, friends said, with a wide smile and a gap between her two front teeth.

She moved to New York City in the fall of 2015 to pursue work in television, but had recently moved back to Los Angeles, where she was living in her childhood home. Some friends said she struggled with drug use, and with cocaine in particular.

Mr. McHenry said in an interview that he wanted Mr. Mejia-Ramirez and the two others being sought by the police to be found guilty and punished severely. “I do want these people made an example of,” Mr. McHenry said.

Even if his daughter overdosed on drugs, he said, she should not have been left alone to die on an empty street. “If they had dropped her off near a hospital or something, things might have been different,” he said.