FBI digital forensic examiner testifies at trial of Samantha Woll's alleged Detroit killer - Part 2

[@Sharon0428]

I think the defendant is innocent, but what is the defense lawyer doing? What is the point to his questions? I am trying to figure out but wonder if he us just trying to show how much he knows vs. Defending his client asking the right questions.....I am confused but hope there is a light at the end of the tunnel???