It is a big war in court, with every side trying to attack the tools of the other side. Therefore, individual expertise is very important. You can not just say "the flawless program gave these results" if no program is flawless, but you have to prove your opinion, and in simple terms!
"The big risk is for someone to execute arbitrary code," he said "If there's a risk that the evidence has been compromised or if something has been planted by a third party... then you can call into question the accuracy of the software and possibly get it thrown out."
Butterworth, who has been grilled many times by defense lawyers, agreed. "I wouldn't put anything past a defense attorney ," he said.