A 30-year-old Lexington man on Wednesday became the second person to be arrested this week in a deadly home invasion four years ago in McClellanville.

The U.S. Marshals Service arrested King Chevais Conyers on Wednesday night in Columbia, Charleston County Sheriff's Office Maj. Eric Watson said.

He faces charges of murder, first-degree burglary and possession of a firearm during a violent crime in connection with the July 10, 2010, incident.

Jeremiah Belton, 40, of North Charleston also was arrested Sunday on the same counts.

Deputies arrested Troy Mason, 25, a month after the crime and jailed Mario Caldwell, 35, of Charleston in 2012.

The four men are accused of posing as FBI agents who busted into an Old Georgetown Road home and exchanged gunfire with the residents.

One of the people who lived there, Melvin Simmons Jr., 35, was fatally shot in his bedroom. A resident also fatally shot one of the suspected intruders, Curtis Darnell Delaney, 26, of North Charleston.

Mason's case remains pending, but Caldwell pleaded guilty in May to voluntary manslaughter, armed robbery and first-degree burglary. That same month, Caldwell confessed, according to affidavits, and also implicated Belton and Conyers.

Caldwell told investigators that all the men helped plan the robbery and were armed with guns when they carried it out, the documents stated.

When he pleaded guilty, Caldwell's sentencing was deferred, which typically means that he will be sentenced after cooperating with the authorities. He faces up to life in prison.

Reach Andrew Knapp at 937-5414 or twitter.com/offlede.