Short answers, pulled from the story.
George Boleyn, Viscount Rochford (c. 1504-1536) was an English courtier, diplomat, and religious reformer who served Henry VIII. He was the brother of Anne Boleyn, Henry's second wife, and the maternal uncle of Queen Elizabeth I. He was executed on Tower Hill on the 17th of May 1536 after being convicted of incest with Anne and plotting the King's death.
George Boleyn was convicted of incest with his sister Queen Anne Boleyn and of conspiring with her to kill Henry VIII. The charges were arranged by Thomas Cromwell, who later told the Imperial Ambassador Eustace Chapuys he had gone to great trouble devising the plot, partly to assist an alliance with Spain. Chapuys himself noted that George was convicted on nothing more than a presumption, and those present at the trial were betting 10 to 1 that he would be acquitted.
George Boleyn was one of the more active advocates for religious reform at the Tudor court. He translated two Lutheran texts from French into English as gifts for his sister Anne, and Henry VIII chose him in 1531 to argue the case for royal supremacy before Convocation. His attendance at the Reformation Parliament from 1533 to his death in 1536 was higher than any other Lord.
George Boleyn attended six foreign embassies to France. His first was between late October 1529 and late February 1530, when he successfully persuaded King Francis I to write a letter supporting Henry VIII's divorce from Catherine of Aragon. His final embassy was in May 1535, when he and his uncle were sent to negotiate a marriage contract between the French King's third son and the infant Princess Elizabeth.
George Boleyn followed the convention of the day by acknowledging he was a sinner deserving of death, but he stopped short of a direct admission of the specific charges. He attributed his fall to trusting in the vanity of the world and the treacheries of fortune, a phrasing that came as close as convention allowed to denying guilt. His scaffold speech was notable for its length and focus on defending his religious convictions.
Jane Boleyn has sometimes been accused of providing evidence against her husband, but no document from the trial itself names her as a witness. The only item traceable to Jane is a letter in which she reported Anne had told her Henry was unable to satisfy a woman. Jane makes no mention of a child in her surviving letters, and historians do not have evidence that the couple had any children.