Crews worked to install the memorial Monday, including a granite base topped with an angel. The site at Woodbine Cemetery in Puyallup invites people to gather in vigil each year on December 6, which is the day Powell disappeared in 2009.
Susan Powell's husband killed the couple's two young children, Charlie and Braden, earlier this year. Josh Powell also died in the fire he set at the home he was renting amid the investigation into his wife's disappearance.
Donations to Crime Stoppers paid for the memorial.
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