Tonight, there is breaking news just as we come on the

air. Law enforcement sources now telling ABC News the Brown

University killer recorded a video before he killed

himself, revealing his motive.

Authorities say the killer revealed a lengthy grudge

that brought him to Brown University, who he was angry

with, and what he says about the students in that lecture hall.

The authorities say that suspect then traveled to Brookline,

Massachusetts, outside Boston, where he killed an

MIT nuclear physics professor in the doorway of his home.

Tonight, the messages on that chilling video, the

suspect saying at one point, “I don’t regret what I did.”

What we’ve now learned tonight, Aaron Katursky standing

by with late reporting.

Also breaking at this hour, sources now telling

ABC News tonight that the U.S.

has now given Venezuela’s interim leader a

list of demands that must be met before Venezuela can sell

its oil again.

Rachel Scott on the breaking news.

She’s live at the White House.

Tonight the flu surging across the U.S.

in record numbers.

cases reported 5,000 deaths.

45 states tonight now reporting

very high or high flu activity.

And what we’ve now learned about this year’s flu

shot. How effective will it be in fighting this?

Tonight, several states in the northeast with winter

weather advisories as we come on, tracking snow and

freezing rain at this hour.

And then the big change coming, Ginger Z is here.

Tonight marks five years since the January 6th

assault on the U.S.

Capitol. Nearly 1,600 rioters

pardoned by President Trump.

Some returning to the Capitol today holding their pardons.

Tonight the White House on its official website

saying the protesters on that day were peaceful.

And the White House website now accusing Vice President Mike

Pence of cowardice and sabotage.

Tonight, new video of a person of interest tonight

in the killings of a dentist and his wife found dead

upstairs in their home.

Authorities now revealing the apparent cause of death

here in New York City.

Multiple firefighters injured battling a major fire spreading

to a number of buildings.

One firefighter surviving after being hit in the head

by a falling air conditioner.

Also tonight, the newest Girl Scout cookie has just been

revealed as quite something.

And Taylor Swift breaking her own record, her new longest

number one song, and what it replaces.

From ABC News World Headquarters in New York, this is World

News Tonight with David Muir.

DOJ: Brown University, MIT professor shooter left video confession on killings

Good evening.

We begin tonight with several breaking stories.

The U.S.

delivering new demands at this hour to Venezuela.

ABC News learning that the U.S.

says Venezuela must kick out China, Russia, Iran and Cuba

and sever economic ties with them before Venezuela