More than 50 people were killed on Oct. 1, 2017 when a gunman opened fire at a concert in Las Vegas, Nevada.

Las Vegas residents donated nearly 800 units of blood after last year’s mass shooting, but new research shows that many of those donations weren’t needed – and some even went to waste.

More than 50 people were killed on Oct. 1, 2017 when a gunman opened fire at a concert in Las Vegas, Nevada.

Lawyers say victims of an October 2017 mass shooting have been “targeted twice” following multiple lawsuits filed this week by Las Vegas-based MGM Resorts International.

 A memorial in Las Vegas for victims of the Oct. 1 shooting that left 58 dead and more than 500 wounded. (Jay Smith / Chicago Tonight)

While public awareness of mass killings is undoubtedly higher, U of I researchers say the frequency with which they occur is steady – and it’s remained that way over the last decade.

More than 50 people were killed Sunday night in what was the deadliest mass shooting in modern American history.

Romanucci & Blandin, a civil practice based in the River North neighborhood, announced Monday it is among a trio of law firms that will represent victims of the shooting at the Route 91 Harvest country music festival in Las Vegas.

(Matt Masterson / Chicago Tonight)

Local progressives and elected officials say the time is now to talk gun reform following the deadliest mass shooting in modern U.S. history.

(EMR / Flickr)

Stephen Paddock, the gunman who opened fire on thousands of concertgoers in Las Vegas late Sunday night, had booked two rooms in Chicago overlooking Grant Park in August, during Lollapalooza, according to a report from TMZ.

In the wake of the massacre of concertgoers in Las Vegas, Chicago is preparing to host one of its largest annual events, the Chicago Marathon, on Sunday. Mayor Rahm Emanuel says the city is ready.

More than 50 people were killed Sunday night in what was the deadliest mass shooting in modern American history.

An eyewitness recounts what she saw in Las Vegas on Sunday night during what has become the deadliest mass shooting in modern U.S. history.