Charges have been added in the murder of the Baton Rouge pregnant teacher whose body was discovered earlier this week in Iberville Parish.

Baton Rouge Police Cpl. L’Jean McKneely says based on the coroner’s report, blood inside her car and interviews conducted with people who knew the victim, investigators were able to conclude 40-year-old Lyntell Washington was fatally shot by 39-year-old Robert Marks.

“We have added the charges of first-degree murder in the death of Ms. Lyntell Washington and first-degree feticide for the 7-month-old unborn child,” McKneely said.

McKneely says Washington’s’ 3-year-old daughter was very helpful in this investigation. He says police confirmed that Washington and Marks had a romantic relationship, and he was the father of her unborn child.

“We have texts showing that she was indeed pregnant for him, and she wanted him to accept his responsibility. He then, from what we can gather, made the decision to end her life,” McKneely said.

McKneely says Marks was the assistant principle where Washington was a teacher, and she was threatening to reveal the true nature of their relationship.

“He is married, and Ms. Washington was threatening to expose their relationship and expose the fact that she was pregnant for him,” McKneely said.