Criminologist Thomas O'Connor says that when DNA evidence shows "inclusion", that is, does not exonerate a client by exclusion from the DNA sample provided, "About the only thing you can do is attack the lab for its (lack of) quality assurance and proficiency testing, or use a 'Chewbacca defense' … and try to razzle-dazzle the jury about how complex and complicated the other side's evidence or probability estimates are." Forensic scientist Erin Kenneally has argued that court challenges to digital evidence frequently use the Chewbacca defense by presenting multiple alternative explanations of forensic evidence obtained from computers and Internet providers to confuse the jury into reasonable doubt. Kenneally also provides methods that can be used to rebut a Chewbacca defense. Kenneally and colleague Anjali Swienton have presented this topic before the Florida State Court System and at the 2005 American Academy of Forensic Sciences annual meeting.