PRETORIA, South Africa - South African police photographs of the blood-spattered scene where Oscar Pistorius shot dead his girlfriend show that evidence was moved around in violation of procedure during the investigation of the killing, the athletes chief defence lawyer said Tuesday. In later testimony, a police ballistics expert police described how he tried to reconstruct the angle of the gunfire, citing tests that suggest the bullets were fired about 2.2 metres (7.2 feet) from a toilet door in Pistorius home. The bullets punctured the door, and three of them hit girlfriend Reeva Steenkamp, who was in the toilet cubicle. Warrant officer Bennie van Staden, a police photographer, took hundreds of photos of the scene, including of blood stains, bullet casings, a gun and a cricket bat found inside Pistorius bathroom in the hours after the double-amputee Olympic runner shot Steenkamp before dawn on Feb. 14 last year. Lawyer Barry Roux has challenged previous police witnesses, seeking to uncover contradictions and reported mishaps to support his argument that officers bungled the investigation, an allegation made by Pistorius at the start of the trial when he pleaded not guilty to murder in Steenkamps killing. In a painstaking process Tuesday, Roux minutely examined many photos taken by van Staden and another police officer and pointed out that objects at the crime scene had been moved and were in different positions in photos. Roux also used time of day records on the images to show that the two policemen taking photographs were in the same room at points, even though van Staden testified he was working alone. Pistorius, 27, is charged with premeditated murder for killing Steenkamp, 29. He denies murder and says he shot his girlfriend accidentally, thinking she was an intruder in a toilet cubicle in the bathroom, and says that he struck the toilet door with a cricket bat to get to Steenkamp after realizing what he had done. Prosecutors charge that Pistorius killed Steenkamp after an argument. Pistorius lawyer asked van Staden to explain differences in photographs of position of the 9 mm pistol that Pistorius used to shoot Steenkamp through a closed toilet door, and of a cricket bat that the Paralympian used to hit the door. "It seems there was movement of the bat" in the interval between two photographs taken by van Staden, Roux said. "It seems like that," van Staden conceded. The police photographer also acknowledged that two photographs of the gun indicated that a mat underneath it could have been shifted. Roux said one photo also differed from the other because it showed a wooden splinter on the gun handle. Capt. Christiaan Mangena, the police ballistics expert, said the bullets were fired at a slightly downward angle and entered the toilet door below the shoulder level of Pistorius, if he were standing without prosthetic limbs. Pistorius said he was on his stumps when he fired. Prosecutors do not dispute the assertion, after initially alleging he was on his prosthetic limbs when he killed Steenkamp. Mangena said he used thin rods and the beam from a laser mounted on a tripod to try to determine the trajectory of the bullets through the door. He also described entry and exit wounds on Steenkamps right arm and her head, and bruises on her chest where a "projectile" struck without penetrating. Associated Press writer Torchia reported from Johannesburg. Shoes Black Friday Deals 2020 . Power had a two-lap average of 218.896 mph in qualifying Friday at the high-banked, high-speed 1 1/2-mile track for his 34th career pole. 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The league announced Monday that Meriweather will be suspended for the first two regular season games for his helmet-to-helmet hit on receiver Torrey Smith in the second quarter of Saturday nights preseason win over the Baltimore Ravens. Meriweather will miss the opener against the Houston Texans on Sept. 7 and the Sept. 14 game against the Jacksonville Jaguars. He will not be allowed to attend team meetings or practices or appear at the teams facilities for any reason during the suspension. The sanction was levied by Troy Vincent, a longtime NFL safety and now the leagues executive vice-president of football operations. The league said Vincent determined that Meriweather "delivered a forceful blow to the head and neck area of a defenceless receiver with no attempt to wrap up or make a conventional tackle." The league said Meriweather has previously been disciplined five times for illegal hits to defenceless players. He was suspended two games last season after two helmet-first hits in a win over the Chicago Bears, but the penalty was reduced to one game after an appeal. Meriweathers tendency to lead with his helmet -- and aim for an opponents head -- has been a major point of concern since he joined the Redskins in 2012. On the play against Baltimore, he and Smith lowered theirr heads at roughly the same time as Smith went for a pass over the middle, but Meriweather lowered the crown of his helmet and clearly wasnt going for a hit instead of attempting a tackle.dddddddddddd The pass was incomplete, and Meriweather was given a 15-yard penalty for a personal foul. "Im trying to do what the NFL asks of me," Meriweather said after the game. "After going through this off-season and working on the things that I need to work on, I get the first chance, and it seems like I failed." Meriweather also suggested hes being held to a higher standard because of his past. "I think theyve been keeping a close eye on me for the last couple years," he said. "Im just going to continue to work on my game and try to get lower to do the things they want me to do." Coach Jay Gruden, speaking before the suspension was announced, said Meriweather was trying to avoid hitting Smiths helmet. "He saw the ball and he tried to lower his target," Gruden said. "Unfortunately, as he was lowering his target, the receiver felt him and lowered his head also at the same time. It was a bang-bang play." Meriweather can appeal the suspension. If it is upheld, the Redskins will have few options at an already thin position for the start of the regular season. Safety Phillip Thomas status is in doubt after he reinjured his left foot, and fellow backup Bacarri Rambo has not tackled well in the open field. Ryan Clark is the other starter. ' ' '