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   Detectives with the St. Louis Major Case Squad are looking for a suspect in the execution-style death of a Normandy man.  

   Police say 30 year old Markquette Nunn had been using a weed trimmer in the front yard of his home in the 7600 block of Bermuda Court about 12:45Wednesday afternoon when someone shot him in the back of the head.  

   A neighbor heard the shot and came outside just in time to see a man running from the scene.  Nunn was pronounced dead at the scene.  

   Police say Nunn shared the home with his girlfriend and their baby son, who were not home at the time of the shooting.  A friend who also lived in the home was inside when Nunn was shot.  He told police he heard the shot, then look outside to see Nunn collapsed in the yard.  

   Police say they have very little to go in so far.  Anyone with information is urged to call the Major Case Squad – via Normandy Police at 314-385-3300, ext. 3018.

The St. Louis Major Case Squad is investigating a murder in Overland.  Police were called to a home in the 9900 block of Iveland about 10 PM Sunday.

Police found a 22-year-old man who'd been shot to death just inside the front door of his home.  Witnesses reported seeing three or four men fleeing from the scene.  

Investigators are expected to release more information later Monday morning.

   Police are still looking for two men who shot and killed a Jennings man Friday night.  

   Police say 38 year old Anthony Sherill had been unloading groceries from his vehicle about 8 p.m. when the two men approached.  Sherrill ran inside his home in the 5400 block of Hamilton, but the men followed.  Police say the suspects shot Sherill in the chest inside his home and then fled.  

   Sherill was pronounced dead at the hospital.  

   Police haven't released a possible motive for the murder.

Three Marines are dead after a shooting at Marine Corps Base Quantico in Virginia.

The suspected shooter, a male Marine, was killed from an apparent self-inflicted gunshot wound when authorities found his body inside a barracks building near the Officer Candidate School early this morning, Lt. Agustin Solivan told ABC News.

Authorities found a second victim dead in the Officer Candidate School, Solivan said. The gender of that Marine was not given.

The gunfire started at 11 p.m. Thursday when the suspected gunman killed a male Marine, Solivan said. The suspect barricaded himself inside a barracks building near the east side of the base near the Officer Candidate School, setting off a standoff with authorities.

The base had been put on lockdown but it has since been lifted.

"Marine Corps Base Quantico is Code Green at this time. All normal activities are cleared to resume," Quantico said on Twitter.

No further information on the victims have been released.

PRETORIA, South Africa (AP) — Olympic athlete Oscar Pistorius has been arrested in the shooting death of his girlfriend, police and the woman's talent agent said Thursday.

Capacity Relations talent management firm said 29 year old model Reeva Steenkamp was the victim of the shooting.

Police spokeswoman Lt. Col. Katlego Mogale told The Associated Press that officers received a call around 3 a.m. saying there had been a shooting at the 26-year-old double-amputee runner's home in a gated housing complex in the capital, Pretoria. A 9 mm pistol was recovered and a murder case opened against Pistorius, who is to appear in court later Thursday.

South African media speculated that Pistorius may have mistaken the young woman for an intruder.

Steenkamp tweeted her excitement about Valentine's Day hours before the shooting.

ARLINGTON, Texas (AP) - Thousands are expected to attend a public memorial service Monday for former Navy SEAL sniper Chris Kyle, who was killed at a Texas shooting range allegedly by a young veteran he was trying to help.

Mourners will gather at Cowboys Stadium to pay tribute to the 38 year old who was reputed to be the deadliest sniper in American military history.

Kyle left the Navy in 2009 after four tours of duty in Iraq and wrote the best-selling book "American Sniper."

Twenty-five year old Iraq War veteran Eddie Ray Routh has been charged with killing Kyle and his friend Chad Littlefield at a gun range Feb. 2.

Kyle will be buried at the Texas State Cemetery in Austin after a 200 mile funeral procession starting in the Dallas area Tuesday morning.