Prosecutors did not explain the decision yesterday or reveal what charges will be filed in the attack that killed the unborn baby girl.
The mother, who was about eight months pregnant, survived and left the hospital on Wednesday.
Dynel Lane, 34, lured Michelle Wilkins, 26, to her home on March 18 with an ad on Craigslist selling baby clothes, investigators say. Inside, Lane stabbed Wilkins and removed the child, police say.
Lane said she had a miscarriage, and he took them to the hospital, where the baby was pronounced dead.
Catherine Olguin, a spokeswoman for the Boulder County District Attorney's Office, said last night that prosecutors won't bring a murder charge in the baby's death.
District Attorney Stan Garnett plans to give out more information today, and the coroner's office is expected to release the findings of an autopsy performed on the baby.
