As authorities in Washington state search for a man accused of killing his three young daughters after taking them for a scheduled custody visitation, the tragedy rings all too familiar for the parents of murdered children and advocates who say courts allow this to happen.

While the GoFundMe account has netted hundreds of thousands of dollars for Whitney Decker, it's people's feelings that stand out.

Paityn, Evelyn and Olivia Decker were found dead, three days after vanishing during a "planned visitation" with their dad, Travis Decker. Here's everything to know about Travis Decker's case.