No, per the article YOU provided, he said he was born in Dallas and even provided a social security card and birth certificate.
"When officials questioned Galicia, he told them he was born in Dallas. He also produced a Texas ID, a Social Security card and a copy of a wallet-sized birth certificate."
Even when presented with more documentation, they still wouldn't release him.
"Finally, she hired Galan, who says that on July 12, she drove to the Rio Grande Border Patrol station with a copy of Galicia's full birth certificate, hospital birth records, his Texas Medicaid card and a student ID. Still, CBP officials said they could not release Galicia."
I'm assuming the different names are of the mother and not of the kid.
"She explained confusion over Galicia's nationality stemmed from a tourist visa issued when he was a child and the fact that his mother used an assumed name on Francisco's birth certificate."
Ok, errors happen, but they were provided overwhelming documentation and still wouldn't release him. Why did it take 26 days, and what would have happened if the lawyer didn't intervene? From the article you posted:
""However," she said, "[CBP] has access to a database where they can check that Francisco was born here in the U.S. It shouldn't have been a problem. They shouldn't have kept him for 26 days just to confirm that he was a natural born citizen."
Lets look at the real reason he was detained, per you article:
"Galan noted Galicia's prolonged detention and near-deportation comes on the heels of a move by the Trump administration to expand fast-track deportation regulations to include the removal of undocumented immigrants who cannot prove they have been in the U.S. continuously for two years or more."
The same thing is happening today, but even worse. Why was it so important to detain this kid for nearly a month when he had all the documentation? Literally the opposite of undocumented. There is no justification for how this went down.