My daughter was pregnant when her boyfriend of 10 yrs died in a river rafting accident in June 3 yrs ago. Neither one of them knew of the pregnancy at the time. She gave birth to a beautiful baby boy only one day after her deceased boyfriend's birthday in September. A DNA test was done of the paternal grandparents, but was inconclusive. (paternal grandfather may not be the biological parent of the deceased). Should another DNA test be done on grandmother and other siblings?