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Waldorf man charged with stabbing his mother to death

After stabbing his mother to death, police said Dunn removed her from the car and left her body in the street.

Charles County Sheriff’s detectives arrested a 32-year-old Waldorf man in connection with the murder of his mother.

Mario Marchell Dunn is accused of stabbing his mother, Swanda Ruegenea Dunn, 57, while they were driving home from a relative’s house.

Her body was found on January 11th on Old Washington Road, near Smallwood Drive.

Police said that after the murder, Dunn removed his mother from the vehicle and left her in the roadway.

Loved ones said Swanda Dunn was a long time employee with the DC Department of Corrections and is described as kind, loving, and someone who enjoyed life.

Deputies found the victim with no ID.

The sheriff's department posted pictures of Swanda Dunn's tattoos on Facebook to ask for help identifying her body.

Dunn was arrested when police recovered evidence linking him to the crime after serving a search warrant at his mother's house, where he lived.

Police said they have no clear motive.

Police said Dunn was charged with first-degree murder, second-degree murder, assault and other related charges.

Mario Dunn has a violent criminal history.

Court records revealed he was arrested nearly a half dozen times on assault charges in the last 12 years.

Mario Dunn also had a second peace order was filed against him in 2006.

A family friend told WUSA9 Mario Dunn suffers from mental disabilities, but police have not confirmed that information.

On the same day Swanda Dunn's body was found, a woman filed a peace order against Mario Dunn.

He was allegedly harassing the woman, but police said it had nothing to do with his mother

Anyone with information regarding this crime can contact the Charles County Crime Solvers at 1-866-411-TIPS.

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