NEW YORK (WABC) -- The suspect in the Gilgo Beach serial killings and his attorneys spent another day in court debating over DNA evidence. Lawyers for Rex Heuermann were in court to ask a Suffolk County judge to disqualify some of the DNA evidence collected by prosecutors. The new technique is whole-genome sequencing of the DNA within a hair.

Heuermann's defense team has sought to bar from trial the DNA results from rootless hairs found at six of the seven crime scenes that have been linked to their client or members of his family.

The question of whether certain DNA evidence can be used in the upcoming trial of a Manhattan architect charged in a string of deaths known as the Gilgo Beach killings is the focus of a court hearing.