They were using DNA from crime scenes and unidentified remains, putting it through this very advanced analysis process called snip genotyping, and predicting people's traits, their hair color, eye color, skin color, shape, face, etc.

他们从犯罪现场和身份不明的遗骸中提取 DNA，将其通过一种非常先进的分析过程，称为基因剪型，并预测人们的特征，他们的头发颜色、眼睛颜色、肤色、形状、面部等。