Kyle Rittenhouse's trial has begun. These are the 3 men he shot

(CNN)The man accused of shooting three people -- two fatally -- during protests in Kenosha, Wisconsin, last year is standing trial this month.

Defense lawyers say Kyle Rittenhouse, then 17, was acting in self-defense last August when he shot and killed Anthony Huber, 26, and Joseph Rosenbaum, 36, and injured Gaige Grosskreutz, now 27.

Last week, Kenosha County Circuit Judge Bruce Schroeder said the three men can potentially be referred to as "rioters" or "looters" during the trial but reiterated his long-standing rule that attorneys not refer to them as "victims."

Rittenhouse is charged with felony homicide related to the killings of Huber and Rosenbaum and felony attempted homicide in connection with Grosskreutz's injury. He is also charged with possession of a dangerous weapon while under the age of 18, a misdemeanor. He has pleaded not guilty.

A jury of 20 people -- 11 women and 9 men -- was selected Monday. Schroeder said Monday the group of 20 will be narrowed to 12 once deliberations begin. He went with a larger number of jurors because of the expected length of the trial, which he told jurors will last roughly two weeks.

Here's what we know about the two men killed and the sole survivor of the shootings.

Joseph Rosenbaum

On the night of August 25, 2020, Kenosha's streets were filled with crowds protesting the police shooting of Jacob Blake, who was shot seven times in the back and side by a Kenosha police officer who said he was trying to detain him.

During those demonstrations, Rittenhouse clashed with a crowd gathered near a car dealership and Rosenbaum, who was unarmed, threw an object that appeared to be a plastic bag at him and missed, according to a criminal complaint filed last year. Rosenbaum and Rittenhouse moved across the parking lot and appeared to be close to each other when loud bangs were suddenly heard and Rosenbaum fell to the ground, the complaint said.

A reporter approached Rosenbaum, who was on the ground, and tried to render aid. As Rosenbaum lay on the ground, Rittenhouse made a call on his cellphone and said, "I just killed somebody" as he ran away, the complaint alleged.

Rosenbaum battled bipolar disorder and was homeless, according to The Washington Post, which reported he had been discharged from a hospital earlier in the day after a suicide attempt. He had spent more than a decade in prison in Arizona after being convicted of sexual conduct with a minor.

He was not part of the protesters nor the groups of armed men who were also there, the Post reported. He had briefly visited his fiancée after being discharged, to whom he proposed the previous winter in the middle of a busy sidewalk. It was just who he was, she told the Post: "He'd make you laugh out of nowhere."

"He wasn't down there as a rioter or a looter," Rosenbaum's fiancée told the Post in reference to August 25. "Why was he there? I have no answer. I ask myself that question every day."

A verified GoFundMe page that raised more than $25,000 last year said Rosenbaum had a daughter.

Anthony Huber

Huber, who was in the crowd of protesters with his girlfriend, was killed as Rittenhouse fled the scene of Rosenbaum's shooting, according to the complaint.

Huber had turned 26 just four days earlier, according to an obituary.

Huber spotted the armed man in the crowded street and he ran toward danger, his girlfriend, Hannah Gittings, told CNN in an interview last year.

"He pushed me out of the way and ran off. I tried to grab him," Hannah Gittings said. She referred to what Huber had done as a "heroic thing."

Videos from the scene show Rittenhouse carrying an AR-15-style rifle, walking the city's streets with a group of armed men. Gittings told CNN her boyfriend launched at the armed individual to protect her and other people nearby.

Huber appeared to reach for Rittenhouse's gun with his hand while holding his skateboard in the other, the criminal complaint said. As Huber tried to grab the gun, Rittenhouse pointed it at his body and fired one round, according to the complaint. Huber was seen staggering away and then fell to the ground, the complaint said. He died from his gunshot wound.

Huber was "completely indescribable" and stood by his beliefs and convictions, Gittings said last year.

"He was an incredibly intelligent person, literally the smartest person I've ever met," Gittings said. "He knew exactly what was at risk for him chasing down somebody with a weapon."

Huber was born and raised in Kenosha, said Anand Swaminathan, an attorney for his family.

"He loved Kenosha," Swaminathan said. "In the years leading up to this event he was making a good life and he was having fun and he was happy and he was trying to do the most he could with himself."

Huber struggled with mental health challenges when he was younger and skateboarding was among the things that brought him the most joy. He had found a community of people in Kenosha who shared the same passion, the attorney added.

"It was something that brought him a lot of happiness, brought him a lot of peace," Swaminathan said. "He had really fought to get himself to a healthy place."

People who talk about Huber talk about "a kid who wanted to help people," the attorney added.

"His family feels like that nature in him is part of why he took the actions he did that night, he wanted to help, he wanted to stop this person," he said.

In a statement to local news station WITI a month after Huber's killing, his family called him a "hero."

"He was always quick to help friends, family, and neighbors in need, and so it was no surprise to us to learn that Anthony came to the aid of others on August 25," the statement said. "While we miss him dearly and wish none of this had happened, we are very proud of him."