Smith said he remembered asking his mom about the box several times, but it "it was either a no-no conversation or blew me off. My mom has always been secretive about things about life."
He told reporters that he recalled his mother once revealing she had lost a baby at birth; he said he recently found out from a relative that she had given birth to twins, one stillborn, the other given up for adoption.
"Even as she was on her deathbed, she never told me what was in that box," he told the St Louis Post-Dispatch. "That's what makes me think maybe she did something to this baby and didn't want to tell anyone because she was afraid she would get in trouble."
Police took a DNA swab from Smith to try ascertain if he and the baby are indeed related. They are investigating as a possible homicide.