Lee Evans is facing 10 counts related to the deaths of the teens, whose bodies were never found.
Jurors deliberated for more than two hours Monday before asking for transcripts of Philander Hampton's testimony.
In exchange for a deal with prosecutors, Hampton testified against his cousin.
Hampton said he and Evans lured the boys to a vacant Newark home, nailed them in a closet and set it ablaze in retaliation for them stealing marijuana from Evans.
Evans represented himself in the trial.
Deliberations are set to resume Tuesday.