Prosecutors rested their case in the suspected Gilgo Beach serial killer's Frye hearing, and the defense called their first witness.

Nathaniel Adams was called to the stand as a software expert by the defense.

Adams, who is a systems engineer at Forensic Bioinformatic Services, testified that software used by the California company testing the nuclear DNA in this case, called IBDGem, is unreliable.

The witness claimed that it failed to follow some verification and validation standards that ensures software systems run accurately.

Suffolk District Attorney Ray Tierney heavily questioned the witness on his resume and expertise.

Tierney said to the judge that the witness objected to whole genome sequencing and every modality to DNA testing there is.

The hearing is to determine if nuclear DNA found on hairs on victims' bodies can be used in the trial. It will continue on Wednesday.