The death of an infant found unconscious last summer in Southeast Washington was a homicide, and his mother has been arrested and charged, police said Sunday.

The 1-month-old boy, identified as Hakeem Brown of Southeast, was found Sept. 1 in the 2900 block of Akron Place, the police said. They said the death was ruled a homicide Jan. 10.

Police spokeswoman Gwendolyn Crump said the boy’s mother, Tisheena Brown, 31,was arrested Sunday and charged with felony murder. Crump said the cause of death was promethazine intoxication. Promethazine is an antihistamine that may cause problems in children under two, according to the WebMD site.

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