Hunter Biden's sudden guilty plea Thursday to tax charges was preceded by vigorous objections from prosecutors when his lawyer said he was willing to give up a trial and enter what's known as an Alford plea.

The surprise took place in federal court in Los Angeles, where more than 100 potential jurors had been summoned for questioning. President Joe Biden's son ultimately pleaded guilty to nine charges in the case accusing him of failing to pay at least $1.4 million in taxes over four years.

Before the guilty plea, Hunter Biden's attorney said he would like to make an Alford plea and forgo a trial.

"This can be resolved today," Abbe Lowell told the judge.

Prosecutors, however, objected, and the judge took a break.

What is an Alford plea?

The Alford plea is named after a 1970 U.S. Supreme Court case involving Henry Alford of North Carolina, who pleaded guilty to second-degree murder to avoid the death penalty but still said he was innocent. The Supreme Court said there was no constitutional violation.

The Justice Department says an Alford plea is when someone "maintains his or her innocence with respect to the charge to which he or she offers to plead guilty."

Federal prosecutors may not consent to an Alford plea "except in the most unusual of circumstances" and only with approval from senior officials in Washington, a Justice Department manual says.

"I want to make something crystal clear, and that is the United States opposes an Alford plea," prosecutor Leo Wise said in court. "Hunter Biden is not innocent. Hunter Biden is guilty. He is not entitled to plead guilty on special terms that apply only to him."

U.S. District Judge Mark Scarsi said he didn't need the government's approval. But after a break, Hunter Biden's lawyers dropped the effort, and he pleaded guilty.

Are Alford pleas typical?

Most states have a form of Alford plea, though traditional guilty pleas are more common.

In 2018, John Dylan Adams entered an Alford plea in Tennessee in the killing of nursing student Holly Bobo in exchange for a 35-year prison sentence. Prosecutors said he had less involvement than an older brother who is serving a life sentence.

In Arkansas, Damien Echols, Jason Baldwin and Jesse Misskelley, known as the "West Memphis Three," were released from prison in 2011 in the deaths of three boys. They were allowed to maintain their innocence yet plead guilty in exchange for 18-year sentences and credit for time served. They are currently seeking to clear their names.

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