A Phoenix woman says she feels sorry for the man suspected of decapitating her daughter, saying he has a long history of mental illness and will be devastated when he realizes what he has done.

Peggy Stowe told KTVK-TV (http://bit.ly/1DLKqtr) she can't get the grisly killing out of her mind.

The body of 49-year-old Trina Heisch was found Saturday morning in the Phoenix home she shared with her husband. Stowe said both had histories of mental illness.

Investigators say when a neighbor went to check on Heisch Saturday, her 43-year-old husband opened the door nude and with several self-inflicted injuries, including a severed left forearm and a missing eye.

Police say the husband is being treated for his injuries and will be charged once he is released.

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Information from: KTVK-TV, http://www.azfamily.com/