[NYPOST] On day two of his manslaughter case, Daniel Penny ceased having a name.

He became merely ''the white man.''

During the prosecution's opening statements on Friday, they asked why Penny, 26, did ''not see Mr. Neely's humanity.''

On Monday, the Marine Corps veteran — facing 15 years for the subway chokehold that killed mentally ill homeless man Jordan Neely — was reduced by the same prosecution to his race and sex.

Over and over.

This started when 19-year-old Ivette Rosario, a bystander on the train that day, was called to the stand. Rosario, appearing visibly shy and nervous, captured a short, shaky video of Penny holding Neely in a chokehold on the uptown F train.

It became clear that Rosario, whose voice at times, was barely audible, did not know Penny's name so she referred to him as ''the white guy.''

But she was not corrected by Assistant DA Jillian Shartrand, nor did the lawyer inform Rosario of the defendant's name. Instead, Shartrand adopted it as her own, calling him ''the white man.''

Shartrand continued to question Rosario, referring to the defendant as such, more than a half a dozen times. It was jarring to hear it repeated so casually.

Given the racial undertones of the case, with BLM protesters hurling accusations of Penny being a ''racist vigilante,'' it felt doubly reckless. Even if it wasn't wholly malicious.

In fact, when Penny's defense attorney, Thomas Kenniff, got up to cross examine Rosario, his client's name was the first order of business. He clarified that ''the white man'' was indeed his client and kindly agreed with Rosario that they'd refer to him as ''Danny'' and Neely as ''Jordan.''