How does Bill Sykes kill his girlfriend?

In Charles Dickens' novel "Oliver Twist," Bill Sykes kills his girlfriend, Nancy, in a fit of rage. After a confrontation about his criminal activities and treatment of Oliver, Sykes brutally murders Nancy with a heavy club. This act is both a culmination of his violent nature and a tragic moment that highlights the brutal realities of life in Victorian England. The murder serves as a pivotal point in the story, showcasing the consequences of Sykes' criminal lifestyle.