A 36-year-old man said Friday that he is still shaken after his encounter with a St. Paul police officer a day earlier. And he doesn’t believe the officer’s video-taped apology was genuine because he didn’t offer it to him directly.

“That’s not an apology, that’s a statement into the air,” said Andrew Casey.

Casey said he called the St. Paul Police Department after Officer Benny Williams cursed at him and feigned a punch on Thursday, and he emailed his video of the incident to the department. He said he did not hear back, though a police spokesman said they have tried to be in contact with Casey.

Casey then posted the 34-second video to Facebook. About three and a half hours later, the police department posted a video response from Williams on the St. Paul police Facebook page.

In the video, Williams apologized and said, “I’m very passionate about what I do and today I just had a human moment where I just said some things that just were not professional.”

Police had attempted to reach Casey through Facebook and a senior police commander talked to Casey’s brother immediately after he sent the video to the department, said Sgt. Mike Ernster, a department spokesman.

It had not been clear what led to the encounter and Casey provided information Friday about what he said happened.

Casey, who is a commercial painter and a photographer, left work Thursday and was heading to a friend’s house in the North End. He parked and noticed a car pull up. Casey said he later realized it was an unmarked squad and the two men in it — who were not wearing uniforms — were plain-clothes officers. One shouted, when Casey’s back was turned, “Hey, do you live there?” Casey said.

“I have no legal obligation to talk to an officer when I’m walking down the street, nor did I even know where this was coming from,” Casey said Friday. “He didn’t identify himself or anything for that matter. I didn’t answer the first time.”

When the officer repeated the question, Casey said he asked him, ” ‘Why?’ and … definitely gave an attitude because I didn’t appreciate it.”

Williams, an officer in the police department’s missing-persons unit, was searching for a vulnerable adult, according to Ernster.

Casey said he was heading down the street when he heard Williams loudly say they were going to tow his car. Casey said he was legally parked and turned back and asked why, which Casey said “immediately led to (Williams’) high aggression level.”

Casey took out his cellphone and thought he was video taping, but later realized he hadn’t begun recording. He said he asked for Williams’ badge number, to which the officer answered, “911.” Casey said Williams then shoved his badge into Casey’s camera lens, which led to the camera being pushed into his face.

When the video starts, it shows Williams approaching Casey and saying, “Put it in my face, I’m gonna slap you down, (expletive),” apparently in reference to Casey’s recording device.

On Friday, Casey said, “I’ve never been more intimidated by a police officer in my life. … I just don’t understand how a temperament like that exists on a police force. I didn’t get pulled over, I didn’t do anything illegal. He physically threatens me and throws a fake punch at me. If I’d have done that to him, I’d have been in jail (Thursday) night.”

Williams is the subject of an open internal affairs investigation. In accordance with state law, Ernster said he could not disclose whether the investigation is related to the incident depicted in the video.