Seems Lord Cardigan liked to get himself into hot water every now and again !!

In 1840 one Captain Harvey Tuckett had insulted Lord Cardigan by publishing a letter which attacked him in the strongest terms ..... At 5 p.m. on September 12 they met at the windmill on Wimbledon Common. Shots were exchanged and Tuckett was wounded. The miller (a civilian), arrested all those involved and took them to Wandsworth police station, where they were charged to appear at the Old Bailey on October 20th. Here a grand jury found the Earl of Cardigan and his second - fit to be charged with intent to murder, maim, and cause bodily harm to Captain Tuckett. The Earl as a Peer of the Realm, was to appear before the House of Lords on February 16 1841.
Duelling had been illegal under Lord Lansdowne’s Act since 1828, carrying the death penalty - in 1837 this was modified to apply only if injury or death resulted, otherwise the penalty was three years’ hard labour or transportation for fifteen years.
The Earl of Cardigan was acquitted on a technicality by a unanimous vote of his peers - the prosecution failed to show that the victim named in the charge and the man found wounded on Wimbledon Common were one and the same person
General public indignation with this much publicised case led to the effective end of all judicial tolerance in the matter of duelling - after this - all duellers were prosecuted.
Source:
http://gaslight.mtroyal.ca/archive/98oct19.htmThe Connaught Journal Thursday October 8th 1840
A London paper complains that 16 officers left the 15th Hussars since Lord Cardigan took the command - but it must be understood in this list are those who were obliged to go out on the reduction of the regiment from the India establishment.
Lieutenant Forrest 11th Hussars, another of Lord Cardigan's officers, was reprimanded by the Horse Guards last week, on complaint of his Lieut.- Colonel for not giving up the key his of barrack rooms, on change of quarters
Lieutenant Tuckett who was wounded by Lord Cardigan in the late duel has left his bed, and is able to walk about his house. Before the Magistrates it was stated by the Police that Captain Tuckett's pistols were of the commonest kind of duelling pistols, but Lord Cardigan's were of a superior manufacture, with hair triggers and French-rifled from within an inch of the muzzles. Lord Cardigan took up the pistols, and shewed the bench that they were not hair triggers, and his Lordship continued to say that he had bought them of Mr. Manton as common duelling pistols, and knew nothing more of them. Captain Douglas said they were loaded by himself and Captain Wainwright. He looked at the barrels to ascertain whether they were rifled or not, and satisfied himself they were not.
http://www.irelandoldnews.com/Galway/1840/OCT.htmlBut then October 28th 1840 ........
Lieut. H. Tuckett, late 11th Hussars, was on Wednesday brought up at Wandsworth before the magistrates, for shooting at the Earl of Cardigan with intent to kill, in the late duel at Wimbledon. He was held to bail in 1000l and two sureties of 500l each.
http://www.irelandoldnews.com/Galway/1840/OCT.html