A former college classmate of Donald Trump Jr. wrote a Facebook post on Wednesday explaining why he thinks Donald Trump is unfit to be president. In his post, Scott Melker wrote that Trump Jr. was drunk throughout much of his college career at the University of Pennsylvania and that he once witnessed Trump slap Trump Jr. so hard that he fell to the ground while Trump Jr.'s entire freshman dorm watched.

Melker opened his post by saying he feels "compelled to share this story before the election, in the hopes that it will shed a bit of light on the kind of person that Donald Trump is, and the kind of son he raised." The story is one of terrifying public abuse. Melker wrote:

I was hanging out in a freshman dorm with some friends, next door to Donald Jr.'s room. I walked out of the room to find Donald Trump at his son's door, there to pick him up for a baseball game. There were quite a few students standing around watching, trying to catch a glimpse of the famed real estate magnate. Don Jr. opened the door, wearing a Yankee jersey. Without saying a word, his father slapped him across the face, knocking him to the floor in front of all of his classmates. He simply said "put on a suit and meet me outside," and closed the door.

Melker went on to categorize Trump Jr. as a "drunk" during his time at Penn, adding that he "always felt bad for him." Melker further wrote that Trump Jr. was nicknamed "Diaper Don" because he had a habit of passing out drunk and wetting the bed:

Donald Jr. was a drunk in college. Every memory I have of him is of him stumbling around campus falling over or passing out in public, with his arm in a sling from injuring himself while drinking. He absolutely despised his father, and hated the attention that his last name afforded him. His nickname was "Diaper Don," because of his tendency to fall asleep drunk in other people's beds and urinate. I always felt terrible for him.

Melker ended his post by saying he plans to vote for Hillary Clinton for president. "It is clear to me that Donald Trump lacks the temperament and basic social decency to run our country," he wrote.