A community is mourning Laura Wallen, a missing pregnant Maryland teacher found dead on Wednesday, and police have charged her boyfriend Tyler Tessier with her murder.
Tessier is expected to be arraigned in District Court in Montgomery County, Maryland on Thursday afternoon, our affiliate WJLA reported.
He faces charges of first-degree murder and is ordered held without bond. ABC7's Brad Bell reports Tessier silently hung his head while his lawyers spoke.
Court documents reveal Tessier sent text messages accusing another man of fathering Wallen's unborn child, according to Bell.
Documents also suggest the motive in this crime was Wallen's discovery that Tessier was secretly engaged to another woman.
Wallen, 31, was a Social Studies teacher at Wilde Lake High School in Howard County, Maryland. Students agreed via social media to wear all-black to honor her memory on Thursday.
Her students and recent graduates described her not just as a teacher, but a "true mentor" outside of the classroom.
Students and staff were preparing to hold a candle light vigil called "The Gathering of Hope" Wednesday night and received the news that Wallen was found dead.
Wallen was four months pregnant, and Tessier sent a text message to Wallen's family saying that he wasn't the baby's father, according to police.
Authorities say Wallen's body was found in a shallow grave on Prices Distillery Road in Damascus, Maryland. Her car was found by police about a mile from the school.
On Monday, Tessier spoke during a news conference with Wallen's family asserting "all he cared about was that she come back," according to ABC7's Tom Roussey.
In 2016, Wallen was named "Teacher of the Year."