Sandra Kay Bryant , pleaded guilty on Thursday in a St. Louis federal court . Her ex-husband , Steven Kemper , pleaded guilty to same charge in 2013 . The two men were charged with conspiracy and money laundering for their roles in the scheme that involved selling fraudulent insurance policies at inflated prices. Couple set fire to their suburban home in 2001 and killed their son . Zachariah , 15 , was found with arms covering head next to fire extinguisher . Bryant was initially charged in state court but judge declared a mistrial .
Sandra Kay Bryant , pleaded guilty on Thursday in a St. Louis federal court . Her ex-husband , Steven Kemper , pleaded guilty to same charge in 2013 . Both charged with aiding and abetting the use of fire to commit mail fraud . Couple set fire to their suburban home in 2001 and killed their son . Zachariah , 15 , was found with arms covering head next to fire extinguisher . Bryant was initially charged in state court but judge declared a mistrial .