The man, Erick Aguirre, 29, was arrested on Tuesday in Aransas County, north of Corpus Christi, Texas, and charged with murder in the death of Elliot Nix, 46, on April 11.
Brent Mayr, a lawyer for Mr. Aguirre, declined to comment on Friday.
According to a charging document, Mr. Aguirre was going out to eat on April 11 with Melanie Castillo, who said in a voluntary statement that she and Mr. Aguirre were dating.
They drove separately to Rodeo Goat, a hamburger restaurant east of downtown Houston.
Mr. Aguirre paid the man, and the couple went to Rodeo Goat.