Prosecutor: Daughter Assisted in the Murder of her Family

SPRINGFIELD, Mo. - In a turn of events, the daughter of Diane Staudte, Rachel, 22, of Springfield, has been charged today with the murder in the first degree for the death of her father and brother.

In a press release, Greene County Prosecuting Attorney Dan Patterson announced that Rachel was charged with first murder in the first degree of Mark Staudte, her father, and Shawn Staudte, her brother. Rachel was also charged with assault in the first degree and armed criminal action for seriously injuring her sister, Sarah Staudte.

photo via Diane Staudte's Facebook page. Diane's youngest daughter (left), Sarah (middle) and Rachel (right).

The events of these crimes took place from April 8, 2012 through June 12, 2013.

Patterson cautions that the charges contained in the felony complaint are allegations and that the defendant is presumed innocent until and unless proven guilty in court.

In the statement, Neal McAmis, the detective assigned to the case, said that he brought Rachel to police headquarters to speak with him about the case after receiving information indicating she was possibly involved.

After initially denying any involvement in the deaths, Rachel admitted her involvement when confronted with the evidence obtained.

"Rachel told me she and Diane researched and planned the crimes," said McAmis. "She said they were 'doctoring' the victim's drinks with anti-freeze. Rachel said they did their research on the Internet and decided to use anti-freeze because it was hard to detect and could be easily mixed in the victims' drinks."

After McAmis interviewed Rachel, he re-interviewed Diane, who eventually admitted that she and Rachel planned, researched and committed the crimes together.

See our previous coverage: 

Springfield Woman Accused of Using Antifreeze to Murder, Poison Family

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