John Brown and the surviving insurrectionist were not given a trial but were swiftly put to execution. Why were they not afforded a trial?

Virginia v. John Brown was a criminal trial held in Charles Town, Virginia, in October of 1859. The abolitionist John Brown was quickly prosecuted for treason against the Commonwealth of Virginia, murder, and inciting a slave insurrection, all part of his raid on the United States federal arsenal at Harpers Ferry, Virginia. (Since 1863, both Charles Town and Harpers Ferry are in West Virginia.) He was found guilty of all charges, sentenced to death, and was executed by hanging on December 2.

On October 16, 1859, Brown led (counting himself) 22 armed men, 5 black and 17 white, to Harpers Ferry, an important railroad, river, and canal junction. His goal was to seize the federal arsenal there and then, using the captured arms, lead a slave insurrection across the South. Brown and his men engaged in a two-day standoff with local militia and federal troops, in which ten of his men were shot or killed, five were captured, and five escaped.[1] Of Brown's three sons participating, Oliver and Watson were killed during the fight, Watson surviving in agony for another day. Owen escaped and later fought in the Union Army.

Thanks to the recently-invented telegraph, Brown's trial was the first to be reported nationally.[2]:291 In attendance, among others, were a reporter from the New York Herald and another from The Daily Exchange of Baltimore, both of whom had been in Harpers Ferry since October 18;[3][4][5][6] reports on the trial, including Brown's remarks, differ in details, showing the work of more than one hand. The coverage was so intense that reporters could dedicate whole paragraphs to the weather,[7] and the visit of Brown's wife, the night before his execution, was the subject of lengthy articles.[8][9][10][11][12]

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is this question from a book? ?