A North Texas man headed to college caught the end of a racist man’s outburst on video.

Dallas police and the U.S. Postal Service are now looking into the incident that had others in line gasp in shock.

Dallas police officers were called to the post office. But by the time officers arrived, the belligerent customer was gone. Another customer captured part of the racially-charged rant and posted it online. Federal postal inspectors are now investigating.

“I just had that gut feeling he was going to say something questionable,” Salem said. “So I pulled out my phone. You never know these days.”

According to the 18-year-old college student, an unidentified man standing at the counter was yelling at a postal worker about a form. The man turned his anger on a woman in line who tried to intervene.

The man then unleashed a series of racial slurs, including the n-word, on the African-American postal employee trying to settle the situation.

Salem says customers were able to get the man’s license plate number and give it to the employee. A USPS spokesman tells FOX 4 that the postal inspector’s office is aware of the situation. The spokesman would not say if inspectors have identified the man, citing the active investigation. More at Fox News 4