In a letter sent to a North Carolina newspaper, a person has claimed responsibility for the death of Army Specialist Megan Touma.

The letter was received by the Fayetteville Observer on Wednesday. In it, the author claims to "have killed many times before in several states."

The author of the letter admitted to killing Touma and threatens to kill again. The letter is signed with a symbol that resembles the symbol used by the Zodiac Killer of the late 1960's.

Army Specialist Megan Touma was found dead in the bathtub of her room at the Fairfield Inn in Fayetteville, North Carolina on Saturday.

Touma, a former Campbell County High School student, grew up in Cold Spring, Kentucky. She joined the Army in 2003 and arrived at Fort Bragg's 19th Replacement Company on June 12, 2008. Touma worked as a dental specialist in the army.

Touma's death remains under investigation. The Fayetteville Police Department called the death suspicious. Authorities said they do not know the cause of death, but said Touma was seven months pregnant.

Touma's is the second pregnant military death in North Carolina this year. Lance Cpl. Maria Lauterbach, from Vandalia, OH, was found dead near Camp Lejeune in January, and a fellow Marine has been charged in her death.