Mother-of-one Lyntell Washington, 40, has been found shot dead a week after going missing in Baton Rouge, Louisiana

A married assistant principal has been arrested after a pregnant teacher he was having an affair with was found shot dead.

Robert Marks, 39, was taken into custody after the body of his colleague and suspected lover, Lyntell Washington, 40, was discovered in Baton Rouge, Louisiana.

The mother-of-one, who was once named 'Teacher of the Year' was reported missing last Thursday morning after her three-year-old daughter, Darillle, was seen walking alone near her car, which had blood inside it.

Police believe Marks, who worked at Brookstown Middle Magnet Academy, may have been fearful of his wife finding out that he'd gotten Washington pregnant.

According to WAFB, her body was badly decomposed and she has to be identified by her dental records.

Her young daughter reportedly told investigators that 'Mr. Robbie' hurt her mother and that she was 'now sleeping'.

Authorities also revealed the child was with her mother and Marks 'when she heard a 'bang'.

The toddler then stated that her mom was 'in the lake' and that it was dark outside when she got hurt.

Detectives said Marks then took the girl for a ride before leaving her alone in a parking lot.

Marks has already been charged with aggravated kidnapping and child desertion.

However prosecutors say he will likely face additional charges, including murder and feticide.

Officials with the East Baton Rouge Parish School System confirmed Washington was the 2014-2015 Teacher of the Year.

Assistant principal Robert Marks, 39, (mugshot left) has been arrested after the body his colleague and suspected lover (right) was discovered in Baton Rouge, Louisiana. Police say he may have been fearful of his wife founding out that he'd gotten Washington pregnant

Marks is escorted to Parish Prison by Baton Rouge Police Department Detectives Joe Dargin (left) and Zac Woodring (right) after being charged with murdering Washington

They also confirmed that Marks is the assistant principal at the same school and has been placed on administrative leave.

Washington's child was turned over to family members.

East Baton Rouge Parish School System Superintendent Warren Drake released a statement paying tribute to Washington.

He said: 'We are deeply saddened by the tragic loss of Lyntell Washington and her unborn baby. Our thoughts and prayers are with her family during this time of sadness.

'We are grateful that now they may begin to find some closure. Ms. Washington was a treasured member of our team, and will be remembered for the impact she had on the many lives she touched through her work in our district.

'We will continue to offer support to Ms. Washington’s coworkers and students during this difficult time.'

Police cars line up along a stream where Washington's body is believed to have been found. Her daughter told officers she was 'in the lake' after 'Mr Robbie' had hurt her



