Pleitez's brother Amilcar Antonio Tejada discovered his sister holding her daughter Nicole's lifeless body when he arrived at their Nantucket, KY home late last week.
He told officers that when he got there is sister told him that "they need to pray and that their sister, Maria Elena, was also in the room," according to court documents.
Maria Elena had died several years ago. Pleitez told her brother that her daughter's face looked like the ghost of Maria Elena.
On Tuesday, the same day she was arrested for her daughter's death, Pleitez told her priest that she was forcing a rose down Nicole's throat to ward off the devil when "she realized the rose was actually her fist and that 'the devil' bit her hand through Nicole," Court documents say. At the home, police found pink rose petals on the floor.
Pleitez told hospital staff that she had considered performing an exorcism on her son, Luis, too.
She told them she "had thought about fighting the demons out of both children and that at one point had a child in each arm."
During police interviews she began "singing and praying," according to court documents.
She said that she had recently returned from a religious retreat.
When in the interview room by herself prior to being questioned, police observed her holding her hands out to make a cross symbol, according to court documents.