Technology is neutral: It convicts and finds innocents. We must make it a regularized part of the system giving defendants access to DNA testing and evidence whenever it might be relevant.
More than 100 people have been sent to death row who were later exonerated because they weren't guilty or fairly tried. Most criminal defendants do not get adequate representation because there are not enough public defenders to represent them. There is a lot that is wrong.
You have to study your field and you have to find out how other people do it and you have to keep working and learning and practicing and ultimately you would be able to do it.