Woman slain with 2 children, mother was recently widowed

Barb Moran places a stuffed animal in the center of a memorial in honor of Kate Kasten, her children, Zoe Kasten, 8, and Jonathan Kasten, 10, and Kate

Barb Moran places a stuffed animal in the center of a memorial in honor of Kate Kasten, her children, Zoe Kasten, 8, and Jonathan Kasten, 10, and Kate

Jason Shaw comforts his daughter Ryley, 10, in honor of Kate Kasten, her children, Zoe Kasten, 8, and Jonathan Kasten, 10, and Kate Kasten's mother, J

Jason Shaw comforts his daughter Ryley, 10, in honor of Kate Kasten, her children, Zoe Kasten, 8, and Jonathan Kasten, 10, and Kate Kasten's mother, J

In this Saturday, Dec. 29, 2018, photo St. Charles County Prosecutor speaks to the press in St. Charles, Mo. A St. Louis-area man shot to death his gi

In this Saturday, Dec. 29, 2018, photo St. Charles County Prosecutor speaks to the press in St. Charles, Mo. A St. Louis-area man shot to death his gi

This undated photo provided by St. Charles County Prosecuting Attorney's Office shows suspect Richard Darren Emery. The St. Louis-area man shot his gi

This undated photo provided by St. Charles County Prosecuting Attorney's Office shows suspect Richard Darren Emery. The St. Louis-area man shot his gi

ST. CHARLES, Mo. (AP) — Relatives say a suburban St. Louis woman began dating the man charged with killing her, along with her two children and mother, after her husband died of cancer.

The St. Louis Post-Dispatch reports 46-year-old Richard Darren Emery of St. Charles, Missouri, is facing 15 charges , including first-degree murder, in the deaths of 39-year-old Kate Kasten, 8-year-old Zoe Kasten, 10-year-old Jonathan Kasten and 61-year-old Jane Moeckel. Emery was captured Friday after exchanging gunfire with officers.

Kate Kasten's husband, Kory Kasten, died in April 2017 after a six-year battle with cancer.

Kate Kasten's father, Frederick Moeckel, says what happened is "beyond belief." He says his grandchildren "loved" Emery. His ex-wife, Jane Moeckel, had been staying with her daughter because she was recovering from hip surgery.

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Information from: St. Louis Post-Dispatch, http://www.stltoday.com