YOUNGSTOWN — A federal court filing describes threats an FBI agent says the father of the victim of Friday afternoon’s homicide on Market Street made on his Facebook page that evening.

The postings, including videos, threatened to take revenge on those involved in his son’s death and family members of those involved.

The threats led to city man Damon Irby Jr., 44, being arrested Tuesday and being placed in the Mahoning County jail.

Irby will remain in the jail until at least until a detention hearing in U.S. District Court Monday, according to federal court documents. A criminal complaint filed Tuesday accuses him of being a felon in possession of a firearm related to a 2019 investigation.

The affidavit states that Damon Irby Jr., 19, was shot to death at 4:30 p.m. Friday while driving a sport utility vehicle in the 3400 block of Market Street in Youngstown.

The Youngsown Police Department issued a news release on the killing Friday but has not released the name of the victim.

While Irby Jr. was sitting at a traffic light, a white van approached the driver’s side of his SUV and then one or more people from the van fired gunshots at Irby Jr., who was taken to St. Elizabeth Youngstown Hospital and later pronounced dead, according to the affidavit.

That evening, the FBI agent began to monitor the publicly available Facebook page of Damon Irby Sr. and saw videos posted there in which Irby Sr. made threatening statements toward the people responsible for his son’s death.

In one four-minute video, Irby Sr. stated: “Jail ain’t an option. Jail ain’t near an option. The police know they got to kill me. They know what it is. It ain’t an option. You know what I’m saying? The only thing I can do is die from here.”

In a 40-minute video, Irby Sr. stated that he was determined to “find out who the (deleted) did this to my child. And I gotta chase them down. And do all of that. And they got siblings. You’ll can starting counting your (deleted) days. If (murderer of Damon Irby Jr.) got his mom and his dad still alive. I am talking about every single one that has something to do with this (deleted).”

On Saturday, Mayor Jamael Tito Brown, Youngstown Police Chief Carl Davis and others held a press conference to urge the public to stay calm and not take justice into their own hands as a result of the Friday killing and one that took place late Thursday.

Read MORE in Thursday’s VINDICATOR.