Cpl. Clinton Copeland said Tongu, 34, was involved in an early morning fight in Lanham on March 18, and went to a hospital complaining that he had difficulty breathing. He was pronounced dead later that day.

The medical examiner ruled Tongu’s death a homicide on Wednesday, but Copeland did not know the cause.

Marchant, of Bladensburg, and Bakarr, of Bowie, have been charged with first-degree assault and are being held without bond. With the medical examiner’s ruling, detectives are working with prosecutors to amend the charges to murder, police said.

Baby who died in cold ruled homicide

The D.C. medical examiner ruled that the death of an infant girl left out in the cold in January was a homicide.

The cause of death was hypothermia, said medical examiner spokeswoman Beverly Fields. The baby’s name is unknown. She’s identified only as Case No. 12-00138.

Investigators are looking for the person or persons who left the approximately week-old baby wrapped in a towel on the steps of a home in the 3000 block of Channing Street NE.

A neighbor walking back from a store at about 11:30 p.m. on Jan. 14 saw the baby lying alone in the 25-degree weather. The baby was taken to a hospital, where she died.

Anyone with information about the case is asked to call police at 202-727-9099.

Bias incidents at U.Md

University of Maryland police are investigating two potential hate crimes on campus, officials said.

In one of the incidents, an academic building elevator was vandalized with anti-Semitic messages. In another, a noose was found in a space under renovation, according to a message from University President Wallace Loh.

“These incidents are abhorrent,” Loh said. “The University of Maryland does not tolerate hate or bias in any form. And, it is the right of all members of our community to work and live in an environment in which they feel safe, respected and included.”

-Scott McCabe and Naomi Jagoda