Prince George’s County police put names and faces to a weekend of tragedies and heroics on Monday, identifying a man who killed a fellow dinner guest, another who was killed in a car crash, and a third subdued in dramatic fashion by a county police dog.

Police say 18-year-old Jarhea Carter was behind a fatal stabbing of a dinner guest twice his age on Saturday night in the District Heights area.

Carter was charged with second degree murder and manslaughter Sunday in the death of District resident Lamont Xaviar Fleet. His arrest was announced on Monday.

Carter lives on the 3200 block of Prince Ranier Place where Fleet, 36, was found in a parking lot suffering from fatal stab wounds.

County police said they were also investigating the death of a 26-year-old Accokeek man who initiated a series of collisions Sunday afternoon on Indian Head Highway in Fort Washington.

Derico Cordora Lynch of the 900 block of Chatsworth Drive was behind the wheel of a Dodge Magnum, police say, when for some unknown reason he struck the side of a Mercedes Benz, crossed the median and struck a motorcycle and a pickup truck. The driver and a passenger of the truck were treated and released.

Neither alcohol nor speed appeared to be factors, police said.

The armed man who was tackled by a police dog with television cameras rolling was also identified as 31-year-old Othman Conteh of Adelphi.

Police say Conteh was under the influence of the hallucinogenic drug PCP on Sunday when his erratic behavior led to a nine-hour stand-off with police. He destroyed several windows inside a home and then jumped from one about 11 feet off the ground in an apparent attempt to escape the barricade.

A county police officer shot at Conteh and missed when he brandished a handgun. Conteh then ran about 100 yards through a residential area before a Prince George’s police dog nicknamed “Rambo” caught up with the suspect.

“Rambo” latched on to Conteh’s shooting arm, forcing him to discharge the weapon, police said.

In a statement, county police said Conteh suffered only minor injuries: “The gunman was taken to a local hospital for minor injuries to his arm sustained during the K9 seizure, and injuries to his hands sustained while destroying windows in his home.”

Meanwhile, the domestic violence unit of the Prince George’s County Sheriff’s Office announced the arrest of a Forestville woman, saying she attempted to murder a man Saturday with a butcher knife.

Charnell Francis Grant used the knife to slash a man in the lower abdomen and then stashed the knife at a neighbor’s residence before deputies arrived, the department said.

County fire investigators on Monday also named a suspect in a case of arson from Friday. Bowie resident Elijah Kareem Shahid, 40, used a flammable liquid to set multiple fires in his home 16300 block of Pewter Lane, authorities said.