Mr Jackson told police after the incident on 20 March in 2017 that he hated black men and that his ultimate goal was to kill several black men – particularly younger men.
“That’s the main crux for me,” he said. He added that interracial couples were “an insurmountable problem” for him.
In March 2017, a then 28-year-old Mr Caughman travelled from Baltimore to New York City with the explicit plan to kill black men, police say.
Mr Caughman was collecting cans and bottles for recycling in the city’s midtown when Mr Jackson approached him and fatally stabbed him with a “Roman short sword” that he had tucked into his pants.
Mr Jackson told detectives that after he stabbed Mr Caughman he fled the area and walked aimlessly around Manhattan until he turned himself into police in the wee hours of 22 March.
“I was just kind of processing what had happened” he told detectives. “If I just stab another person what difference does that make? The point’s already been made.”
The interview video also reportedly shows Mr Jackson re-enacting the killing to lead interrogator Detective Joseph Barbara.
Mr Jackson, who booked a hotel in Times Square as his base, told detectives that he was going for “something a bit bigger” calling it a “terrorist attack” and adding that he wanted to “influence the national conversation”.
For years he ran a local branch of Neighbourhood Youth Corps, an anti-poverty programme giving low-income youth work experience.
Seth Peek, a cousin of Mr Caughman told The New York Times he earned an associate degree attending college in Brooklyn and Staten Island. Mr Caughman labelled himself a “can and bottle recycler” in his Twitter bio – a way his relatives said he made ends meet.
Mr Jackson would face a maximum sentence of life in prison without parole if convicted.