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Blake, a 29-year-old African-American, was in front of his three sons during an attempted arrest in on Sunday.
Photos showed on the streets of the city holding an AR-15-style rifle, while footage of an interview he gave to a journalist before the shootings shows him claiming to be there to protect businesses.
He is alleged to have shot one man during a confrontation on a used car lot and another two who later attempted to detain him.
He was arrested on Wednesday in his hometown, Antioch, Illinois, 15 miles from Kenosha, which is in the neighbouring state of Wisconsin.
He has been charged with one count of first-degree intentional homicide, one count of first-degree reckless homicide, one count of attempted first-degree intentional homicide, and two counts of first-degree reckless endangerment.
If convicted of first-degree intentional homicide, he faces a mandatory life sentence.
Speaking ahead of Rittenhouse's extradition to Wisconsin, defence attorney Lin Wood said: “From my standpoint, it’s important that the message be clear to other Americans who are attacked that there will be legal resources available in the event false charges are brought against them.
“Americans should never be deterred from exercising their right of self-defense.”
He also took to twitter to thank all the "freedom-loving Americans" who had offered their support.
"Many others will need your help in coming days. Stay strong," he wrote.
"Continue to speak truth. Continue to demand justice under our Constitution. Continue to be fearless."
'I JUST KILLED SOMEBODY' The two men killed on Tuesday have been named as Joseph Rosenbaum, 36, of Kenosha, and Anthony Huber, 26, of Silver Lake, around 15 miles from the city.
Footage shot around midnight showed Rittenhouse and Rosenbaum in some sort of melee on the forecourt of a used car retailer.
Rosenbaum can be seen chasing Rittenhouse across a lot and throwing a plastic bag after him.
The two then move behind a car and shots can be heard.
A man is then seen lying on the ground in the lot with a head wound.
Rittenhouse is seen jogging away from the scene while saying into a cell phone: "I just killed somebody."
Footage later showed Rittenhouse walking along a street, still holding a rifle, while a number of protesters move after him.
At one point, Rittenhouse falls to the floor, and a man thought to be Huber attempts to disarm him.
Rittenhouse then appears to fire his rifle and Huber falls to the ground, reportedly after being hit in the stomach.
Another man, Gaige Grosskreutz, 26, then approaches Rittenhouse but is shot in the arm.
None of the three men are thought have been armed when they were shot.
Following the shootings, Rittenhouse was filmed walking towards a line of armored police vehicles with his hands raised, but he was not arrested until the following day.
Facebook has since said it is investigating a 3,000-member group called "Kenosha Guard", which reportedly promoted an event encouraging armed civilians to take to the streets to defend the city on Tuesday.
Speaking at a press conference on Wednesday, Kenosha police chief Daniel Miskinis appeared to blame the violence on all those who had violated a citywide curfew.
"Last night, in a situation that began peaceful and turned somewhat unruly ... persons who were out after the curfew became engaged in some type of disturbance and persons were shot," he said.
"Had persons not been out involved in violation of that, perhaps the situation that unfolded would not have happened."
Footage is thought to show Rosenbaum, centre, throwing a plastic bag at Rittenhouse, left of centre, before the shooting Credit: Storyful/Regg Inkagnedo Rittenhouse sits on the floor holding a rifle, while Huber lies on the ground to his left Credit: Reuters Kenosha police chief Daniel Miskinis said the deaths wouldn't have occurred if a citywide curfew had been obeyed Credit: Reuters
New graphic footage of Kyle Rittenhouse, 17, shooting in Kenosha protests emerges online