rita nissan reports for wjz. >> reporter: police quietly escorted olympic track star, oscar pistorias, to prison in south africa. authorities charged the 26-year- old with murdering his girlfriend. model riva steencamp. police say she was shot four times inside the runner's upscale home. they've recovered a 9- millimeter pistol. >> a young woman did die on the scene of gunshot wiewmeds. >> reporter: 50orias is a hero in south africa, dubbed blade runner for his artificial, high- tech legs. he made records, becoming the first double-amputee ever to make it to the games. >> he anchored south africa's team relay, here at the olympic stadium. >> reporter: he had been with his girlfriend for several months. hours before she died, steencamp tweeted about valentine's day, saying it should be a day of love for everyone. >> i knew her quite well. she was a humble person. she was beautiful inside and out. >> reporter: police say they have been called to the athlia -- athlete's home before for domestic trouble. authorities say witnesses heard screaming before the shooting. forensic investigators

rita nissan reports from london with more on what happened. >> reporter: police quietly escorted olympictrack star oscar pistorias to prison in south africa. authorities charged the 26-year- old with murdering his girlfriend, model riva steencamp. police say she was shot four times inside the runner's upscale home. they recovered a 9-millimeter pistol. >> a young woman died on the scene of gunshot wounds. >> reporter: pistorias is a national hero in south africa, dubbed "blade runner" for his high-tech, artificial legs. he became the first double- amputee runner ever to compete at the games. >> reporter: the track starter made it to the 400-meter semifinals and anchored southafrica's team relay here at the stadium. >> reporter: he had been with his girlfriend for several months. hours before she died, steencamp tweeted about valentine's day, saying it should be a day of love for everyone. >> i knew her quite well. she was a humble person. she was beautiful inside and out. >> reporter: police say they had been called to the athlete's home before for domestic trouble. authorities say witne

in london, rita nissan, wjz eyewitness news. >> south african media are speculating that he may have mistaken his girlfriend for intruders. authorities say that is surprising to them. >>> in an effort to stop capitol punishment in maryland. the governor says he believes they will ban capital punishment this session. senate president mike miller, supporter of the death penalty, also says the measure to repeal will pass in the senate by a comfortable margin. more on this passionate debate, all new tonight at 5:00. >>> marylanders now have four new dorchester county sites. those shells are used in oyster restoration. they are used for environmental science centers, horn point labs. the landfill transfer stations. in secretary. since 2009, 15% of the state's oyster shells have been recycled. >>> time for a look at the rush hour ride home. kristy breslin is at wjz traffic control. >>> definitely not a good start out there for southbound 795. you'll see a lot of brake lights there, down to the beltway. as far as the beltway goes, top side inner loop, slowing there from the jones falls expr

. >> rita nissan for cbs news, london. >> lawmakers in england say the chips will remain optional, becauseoutside in public as often. here in the u.s., only about 5% of an estimated 130 million dogs and cats have those microchips. >>> we begin with a developing story out of fairfax county where the attorneys for the three teenage boys charged with child pornography deny the teenage girls in those sex videos are victims. all the boys in the videos attend west springfield high. peggy fox talked to one of the boys attorneys who say their behavior was stupid, but it was not criminal. >> i don't think these girls are victims anymore than the boys are victims. they are all foolish. >> defense attorney is representing the youngest of three boys from west springfield high school charged with child pornography. he has seen the videos and says there are ten of them that run from 10 seconds to 3 minutes. he says they were all taken on one boy's cell phone. >> one boy running into the room while a couple is engaged in a consensual sex and turning on his cell phone. that's the extent of the production.