How can
    zinaa be proven?
Question

                I know that in the past if someone has
      committed adultery, they had to bring 4 witnesses . My question is can we prove that
      today by using latest scientific methods as the DNA test, instead of bringing 4 witnesses.
Praise be to Allah.According to Islamic sharee’ah, zinaa can only be
    proven by clear evidence, namely the testimony of four trustworthy and sound witnesses who
    saw it actually happen, or by confession of guilt, or by the woman becoming pregnant. It
    cannot be proven by DNA testing or by use of cameras and videos in place of the things
    mentioned above. And Allaah knows best.