A 37-year-old South Carolina man has been arrested and charged in a homicide that occurred in East Potomac Park almost 20 years ago, the D.C. police said Tuesday.

Police said Lamont Deshawn Terry, of Columbia, S.C., was arrested on a warrant in January, and brought to the District on Monday, where he was formally charged with felony murder while armed in the death of Chet Hunter Matthews, 27, of Washington.

Police said Matthews was found fatally shot about 11 p.m. May 25, 1992 in the 1100 block of Ohio Drive SW, near the 14th Street Bridge and the U.S. Park Police station. Park Service officials said at the time that they couild not recall another killing in East Potomac Park.

News accounts from 1992 described Matthews as a letter carrier who worked from the Wheaton station of the U.S. Postal Service.

D.C. police are investigating the fatal shooting of a Southeast man Tuesday morning in Marshall Heights, authorities said.

Police responded to reports of gunshots in the 300 block of 50th Street SE shortly before 1 a.m., authorities said. They found Lamar Marquel Walker, 21, nearby in the 5000 block of Call Place SE.

As part of Alexandria’s plans to honor a paramedic killed in the line of duty last week, the command staff and all first responders in the Alexandria Fire Department will be out of service for two days.

First responders from Arlington and Fairfax will staff Alexandria’s fire houses during that time, according to Chief Fire Marshal Robert Rodriguez of the Alexandria Fire Department.

A Sterling man has filed a federal lawsuit against a former Loudoun County Sheriff’s deputy who he said struck him in the back of the head without provocation.

The November 2009 incident was recorded on the deputy’s dashboard camera and can be seen here.

Carlos Garcia, the plaintiff in the case, had been detained by another Loudoun County deputy and a K-9 officer and was standing with his hands above his head when Loudoun County deputy Terry Daniel ran toward him and struck him, according to a complaint filed Nov. 9, 2011 in Alexandria federal court.

The video shows a man, his hands in the air, interacting with a man in uniform and standing with his back to the camera. A sheriff’s deputy runs up from behind, making contact with the man who falls to the ground. There is no audio, so it is unclear if words were exchanged. It is also unclear what happened immediately before or after.

According to the lawsuit, the incident occurred Nov. 14, 2009 after Garcia and several relatives celebrated his wife’s birthday at a restaurant in a Loudoun shopping plaza. Because they drank alcohol, Garcia and his family members called a cab; when the vehicle arrived, a Loudoun County deputy at the scene informed the driver that it was illegal to transport that number of passengers, the complaint said.

After the cab drove away, the deputy asked Garcia and his relatives to wait on the shopping plaza walkway, according to the complaint. But Garcia’s brother-in-law attempted to walk away, which “precipitated an incident,” the complaint said. More deputies were called to the scene, and Garcia and his family members were detained, the complaint said.

Sheriff’s Office records indicate that Garcia and his family members were charged with drunk in public and assault on a police officer, after an altercation left one deputy with “minor contusions on his arm, leg and shoulder, according to Sheriff’s Office spokesperson Liz Mills. She did not elaborate.

An unidentified male at the White House was taken to a hospital after suffering a hand injury Tuesday morning, authorities said.

The male was injured shortly before 11 a.m., authorities said. D.C. Fire/EMS spokesman Lon Walls said that shortly after the incident, the male patient, whose age was not released, was taken to a hospital and faced losing one or two fingers.

However, a White House official said the injury was minor and an ambulance was called out of an abundance of caution.

It is unclear how the male was injured.

This item has been updated.

Read more: The Post’s public safety coverage