https://www.youtube.com/watch?v=O3oz3CesCOM

The father of a 13-year-old Staten Island teen who hanged himself this week after being mercilessly harassed by bullies at Holy Angels Catholic Academy posted a heartbreaking video to Facebook about what his family has been put through.

Daniel Fitzpatrick, his son, left a two-page letter before taking his own life.

“I gave up,” the teen scrawled on two sides of a single sheet of paper. “The teachers . . . they didn't do anything,” he said, pouring his heart onto the page.

…His parents said the boys targeted him during gym class, often throwing balls at him. A teacher also embarrassed Daniel by calling him “lazy” in front of the class, the boy's father alleged.

Kristen, the youngest of Daniel's three older sisters, also attended Holy Angels in Bay Ridge and said the teacher was known for humiliating students.

He would hold up tests and papers at school dismissal, publicly displaying students' scores to embarrass those who did poorly, she said.

“If one person didn't like you, no one liked you,” she said. “Danny was always left out. He used to come up to me and ask me to get kids to play with him. The other kids would say they thought he was weird.”

Fitzpatrick's father denounced the bulllies in his video, which has since gone viral:

“I hope the memory of what you did to my son is burned in your memory for the rest of your life and you suffer as much as he has suffered under your bulls**t…I have no words to describe the pain I am feeling right now. The parents of those boys, you know who you are, your boys know who you are, I know who you are – now the world knows what kind of people you are and what you will be. To the parents of the boys who tormented my son, all I have to say is I hope you never have to feel what my family is going through right now. You get to hold your children every night and day for the rest of your lives, I don't get that anymore. Your little monsters took that from me, and my wife, and his sisters.”

💔 to see yet another story like this. RIP daniel; condolences to his family. we need to listen + care more. https://t.co/LJ8JM58xNh

— Monica Lewinsky (she/her) (@MonicaLewinsky) August 15, 2016