A Florida man is accused of killing two children , ages 9 and 7, before intentionally setting a mobile home they were in ablaze. Witnesses say the kids' mother ran into the trailer while it was on fire to try to save them, to no avail.

"She went into the trailer trying to get them. That's a mother's love," neighbor John Wenzel told local CBS affiliate WEAR . "She went inside the house trying to get her kids, but [it was] too hot."

Police say John Henry Walston Jr., 27, sexually assaulted one of the two children — 9-year-old Vayden Orum and 7-year-old Rayden Smith — inside his trailer at the Grand Oak Mobile Home Park in Escambia County and then murdered them both.

Walston allegedly set the residence on fire early Friday morning after the killings and fled. The mother who tried to rescue

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