An activist with a megaphone, wearing a BLM hoodie, pressed on his fellow protesters, chorusing: "If Kenosha doesn’t get it, shut it down".
He then began chanting: "Seven shots in the back" - a citation to Jacob Blake, a black man who was shot seven times by a white officer in Kenosha on August 23, 2020.
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Blake's shooting prompted the Kenosha riots, during which Rittenhouse on August 25, 2020, shot and killed two white BLM protestors and injured a third.
The jury in Rittenhouse's case started their discussions on Monday after an intense two-week trial.
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Rittenhouse is charged with first-degree intentional homicide and other counts for killing Joseph Rosenbaum and Anthony Huber and injuring Gaige Grosskreutz.
Ahead of the verdict, the governor of Wisconsin, Tony Evers, ordered 500 members of the National Guard to be put on standby, 60 miles away, in case of unrest.
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Many expect there to be wrath from the "losing" side of the case, regardless of whether the 18-year-old is sentenced or acquitted.
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"We continue to be in close contact with our partners at the local level to ensure the state provides support and resources to help keep the Kenosha community and greater area safe," Evers stated.
"The Kenosha community has been strong, resilient, and has come together through incredibly difficult times these past two years, and that healing is still ongoing," Evers said.
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"I urge folks who are otherwise not from the area to please respect the community by reconsidering any plans to travel there and encourage those who might choose to assemble and exercise their First Amendment rights to do so safely and peacefully."
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Kenosha Police Department and the Kenosha County Sheriff's Department said they are watching the trial and are struggling with local and federal officials to guarantee the "safety of our communities."
"We recognize that there are varying opinions and feelings that revolve around the trial that may cause concerns," the two agencies said.
The courthouse saw demonstrators calling for Rittenhouse's conviction on Monday and Tuesday, and supporters demanding his acquittal.
Protesters carried signs that read, "Know justice, know peace," "Self-defense is not a crime," and "Racism kills."
Their chorus could be heard inside the courthouse.
Among them were Mark and Patricia McCloskey - the Missouri couple who made headlines when they stood outside their St Louis mansion armed with guns as Black Lives Matter protesters passed last summer.
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