The fetus was found to be safe, he said, adding that the woman's medical examination was conducted.
Lois Riess, 56, of Blooming Prairie, Minnesota, has been charged in the shooting death of Pamela Hutchinson, 59, of Bradenton, Florida.
All the three victims were rushed to a Rae bareli district hospital, where the woman and her daughter succumbed.
Naidoo said medical tests revealed the baby had been raped.
Riess is believed to become driving Hutchinson's vehicle.
She is believed to have traveled west from Florida and was last suspected to be in the area of Corpus Christi, Texas. Riess' 2005 white Cadillac Escalade was found abandoned in a Florida park. Her current whereabouts are unknown.
Lee County, Florida, Undersheriff Carmine Marcino said the suspects "mode of operation is to befriend women who resemble her and steal their identity". "U.S. Marshals are actively involved in a national search for this risky fugitive".
Authorities say the suspect should be treated as armed and risky.
Riess is also wanted at the March passing of her spouse.
"I've never seen her like that before", McDonald said. The spouse said no body in the office had found David Riess in above a couple of weeks.
During the investigation, detectives were able to determine the fall was an accident.
After allegedly killing her hubby, Riess forged her husband's signature to swipe $11,000 from his bank account and headed to a casino in Iowa. Police from the Iowa Division of Criminal Investigation, the BCA and Dodge County moved into the casino, but Riess had abandoned.
The girl told police she overheard her mother telling someone on the telephone that Martini "had been beating her up all day and throwing her into the cabinets", according to a police report.