When Rodney King was on the bottom, getting kicked, hit with batons and shot with Tasers by a number of members of the Los Angeles Police Division in 1991, the episode was captured on video by a person who lived throughout the road from the assault and occurred to have a brand new camcorder.

There have been police sirens, automobiles screeching to a cease and the sound of a helicopter “circling tremendous low proper above us,” the person, George Holliday, recalled lately. It awoke him and his spouse.

Mr. Holliday didn’t notice precisely what the commotion was, he stated, however he instinctively grabbed his video digicam, which he had purchased a few month earlier, and went out on his balcony to file the scene. “You understand how it’s when you could have a brand new piece of expertise,” he stated. “You movie something and every thing.”

Now Mr. Holliday, 61, is auctioning the digicam he used to seize the assault on Mr. King. The starting bid is $225,000.

The digicam is being auctioned on-line by Nate D. Sanders Auctions. Bids are being accepted by way of Thursday at 5 p.m. Pacific Time, based on a spokesman for the public sale home.

The video that Mr. Holliday took that evening circulated around the globe and led to the arrest of 4 cops. Their acquittal on state felony prices prompted riots that resulted in the deaths of dozens of people and about a billion dollars’ worth of damages.

Later, two officers have been convicted on federal civil rights prices and sentenced to jail, and a jury in a civil case awarded Mr. King $3.eight million in damages.

Twenty-nine years later, photos of violent police encounters have grow to be commonplace, largely due to social media, 24-hour cable information stations and the ubiquity of cellphones, smartphones and physique cameras — all gadgets a lot much less cumbersome than the Sony Video8 Handycam CCD-F77 that Mr. Holliday used standing on the balcony of his second-floor Lake View Terrace condo on March 3, 1991.

The digicam is about 12.5 inches lengthy and weighs about two kilos, based on Sam Heller, a spokesman for the public sale home. Mr. Holliday stated the digicam was “like a measurement 13 shoe.”

For historians and civic leaders, the present deluge of images tied to police brutality has its roots within the grotesque assault in Los Angeles.

“The Rodney King video was the Jackie Robinson of police movies,” the Rev. Al Sharpton stated in an interview.

The digicam comes with a letter of authenticity, signed by Mr. Holliday. It doesn’t work anymore and doesn’t embrace the video of Mr. King’s beating.

In response to an announcement from the public sale home: “The froth cowl of the digicam microphone is sort of fully deteriorated, which is the situation during which the F.B.I. returned the digicam to George Holliday circa 2015. The camcorder stays in excellent situation in any other case.”

Mr. Holliday owns the rights to the video he took of Mr. King’s beating, although the tape itself continues to be within the possession of the federal authorities. “I’ve not made that a lot” from it, he stated.

Mr. King died at his home in Rialto, Calif., in 2012. He was 47.

The beginning value for the digicam was set by Mr. Holliday and the public sale home, Mr. Heller stated. It’s “primarily based on the digicam’s significance,” he stated. “There’s no direct comparable for it, however different one-of-a-kind items with historic significance promote for six figures and upwards.”

“How a lot does one thing like this go for?’’ Mr. Holliday requested. “I don’t know.”

In 1999, a federal arbitration board ordered the federal government to pay the family of Abraham Zapruder $16 million for the footage he took of President John F. Kennedy’s 1963 assassination. The federal government acquired the video below a 1992 legislation that required that each one data of the assassination be transferred to the Nationwide Archives for preservation and analysis.

The best way to worth Mr. Holliday’s digicam is an open query.

Marcus Anthony Hunter, a professor of sociology and African-American research on the College of California, Los Angeles, stated that auctioning the digicam was like asking, “How a lot would I pay for a slave ship?”

The “value of training is invaluable,” he stated. “So there is part of it that feels just a little odd in that you just’re placing a value on it, on one thing that’s maybe invaluable.”

He urged donating it to the Smithsonian Establishment. A spokeswoman for the Smithsonian declined to touch upon the public sale.

“I’ve already donated a ton of cash,” stated Mr. Holliday. He stated he hoped the public sale would “encourage individuals to make use of their cameras for every thing, the unhealthy and the nice.”

“Individuals can accuse different individuals of doing stuff,” he added. “However when it’s on digicam, it’s totally different. You simply can’t argue with it.”

The Los Angeles Police Division subpoenaed the digicam and videotape throughout its investigation into the assault, Mr. Holliday stated. Later, the Federal Bureau of Investigation subpoenaed the objects because it proceeded with its case towards the officers, he stated.

With the public sale cash, Mr. Holliday hopes to purchase a house. “I’m nonetheless a plumber, even in any case of this,” he stated. “I’m working my butt off crawling below homes day-after-day.”

Mr. Sharpton stated Mr. Holliday had the best to public sale the digicam.

“He clearly did one thing historic,” Mr. Sharpton stated. “If he needs to monetize it, that’s a personal resolution.”