CAMDEN COUNTY, Mo. -

A psychiatrist's testimony Wednesday convinced a judge to set aside a Camdenton woman's Alford plea.  The doctor said Bradie Simpson was suffering from  a mental disease at the time of the alleged attack.

Bradie Simpson was accused of attacking her 9 month-old in Camden County. Simpson's older son called authorities in Feb. 2012 after finding his mother and sister missing. Deputies later found both of them in a wooded area behind the home, and Simpson's throat was cut.

Investigators say Simpson went to a local church months before the incident saying her child was possessed. Both mother and daughter survived.

By trying to use an Alford plea, Simpson was admitting prosecutors have enough evidence to convict her, but she still maintains her innocence.