Missing pregnant teacher, Laura Wallen, of Olney, who had been reported missing last Tuesday, has been found deceased, according to the Montgomery County Police Department.
Tessier, who was engaged to another woman and admitted disposing of some of Wallen's possessions, was arrested Wednesday and charged with first-degree murder, Montgomery County Police Chief Tom Manger said.
Investigators believe Tessier may have killed Wallen Sept. 3 then drove her SUV to an apartment complex where he ditched it.
A family member said they last her from her when she sent a troubling text message on Sept.4. They were aware of this when they had him speak in public, and authorities have spoken to her, but the results of her interview have not been made public.
Tessier appeared Monday beside Wallen's parents and her sister at news conference pleading for Wallen to contact her family and asking for her safe return saying "Laura, if you're listening, it doesn't matter what's happened".
"She just turned it around", Jawan Taylor said of his time at Wilde Lake. He said the acquaintance declined to help.
One recalled how Wallen would open wide her arms, wiggling them.
Screenshot of Tyler Tessier speaking at a news conference, two days before he was arrested in connection to the death of his pregnant girlfriend.
"If somebody has her, please understand that you've taken away a huge person in so many people's lives", Tessier said. Montgomery County police allowed Tessier to participate in the news conference, despite their belief that he was responsible for her disappearance. Tessier allegedly asked the acquaintance to lie if police ever asked her about picking him up there.
The friend told Wallen to take a photo of the area, which she did.
The nearly daily hugs from Wallen had students referring to her as "Wallabe with the jellyfish hugs", said Moore, 18, who took Wallen's world history class as a senior a year ago at Wilde Lake.
Her sister told her to take a picture.
A student who knew Wallan described her as a teacher who went above and beyond.
They had planned an event called a "gathering of hope" for Wallen's safe return.
Wallen, a popular high school history teacher, was four months pregnant when she died.
The cause of death is unknown, Manger said.
During the same press conference, Tessier sat with Wallen's parents as they offered a $25,000 reward to anyone for information on Wallen's whereabouts.
"The decision to allow him to participate in that news conference was a calculated decision made by the detectives in this case for the express objective of hearing what he had to say". The victim's family gave their approval.