Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: (CNN) -- The story of their deaths -- hacked with hatchets, doused in gasoline before the home they were in exploded, according to police -- has been well documented. Six days later, hundreds packed a Tacoma, Washington, church to remember the lives of young Braden and Charlie Powell, describing them as intelligent, compassionate, joyful boys who made big impressions in a short time. "This moment is about two beautiful boys," Dean Curry, lead pastor at the Life Center church, said to open Saturday's memorial service. Authorities say the boys' father, Josh Powell, snatched them from a social worker who was delivering them for a supervised visit Sunday, locking the doors before killing them, as well as himself, just minutes before his Puyallup, Washington, home exploded.A memorial service is held in Tacoma for Braden and Charlie PowellThe boys' father struck the boys with a hatchet and blew up his home, police say"We know that they are with their mother," their grandfather saysThe mother, Susan Cox-Powell, was last seen in December 2009 
 Question:While _ has not been found, her father suggested that he believes she is dead -- and that she is now reunited with her sons in heaven.

Susan Cox-Powell