. >> chad robertson, brandon swetzer and brandon teagarden did not respond to requests for interviews. al jazeera's undercover investigation raises new questions about the possible use of performance enhancing drugs in sport. >> inns jo joining us now is al jazeera contributor dave zyron, edge of sports radio with dave zyron. he joins us now from denver. dave, first of all, peyton manning suggested to an espn reporter he is going to sue or may consider suing al jazeera. what is your reaction? >> i certainly hope he does. one thing we've learned about these performance enhancing drug stories you don't really get the truth, from if various hangers on or people behind them, until their hand goes on that bible and prison time looms as a possibility. i was watching a espn show right before coming on and it was remarkable for me to see four paid journalists for espn professional journalists saying that peyton's outrage is proof enough for them that the al jazeera story is false. as if we haven't seen time and again with these stories the outrage, lance armstrong, marion jones, rafael palmer

. >> reporter: chad robertson, brandon spletzer and tailor teagarden didn't responds to comments. other professionals who did responds deny the allegations. al jazeera's undercover investigation raises new questions about the possible use of performance enhancing drugs in sport. debra davis >>> a government official in southern china has killed himself a week after a devastating land slide in his city. police say he jumped from a building. he worked in the local government, the city where a pile of construction waste slid onto an industrial part burying several buildings. one person was killed and 75 are missing. the head of china telecom has become the latest high profile target of a government crackdown on corruption. the ruling communist party says he is being investigated for disciplinary violations. adrian brown reports from beijing. >> reporter: he is boss of china telecom. it is one of the three big telecommunications companies in this country. he has only been in the job since august, but according to a posting on the website of chinese anti corruption watchdog, he is now

. >> reporter: taylor teagarden, chad robertson and brandon spletzer didn't respond. other professionals named in the program who did respond denies the allegations. this raises the question of enhancing drugs used in sport >>> it is one of the most dangerous journeys in the world. the migrants journey to the united states. the best chance of getting through is by hiring a people smuggler. they must travel through in honduras, a town with the highest homicide rates in the world around get to guatemala. from there they go through another in the cartel mexican state and then people smugglers take them across the border to san antonio. we gained access to one smuggler. >> reporter: roaming one of the world's most murderous cities looking for those trying to escape. this is a people smugger in honduras. he has given us access to the clandestine business of getting people from here to the united states. a call from his latest client. >> translation: he is a migrant like any other. we're taking him to the safe house where he will stay with the others who are travelling. >>

. >> taylor tea garden, chad robertson and brandon supplement serz didn't respond.harlie sly says his statements captured on hidden camera about athletes were false and incorrect. our investigation raises serious questions about whether pharmacists, doctors are taking doping to a new level. deborah davis, al jazeera, washington. a response to youtube. the broadcaster al jazeera has somehow obtained recordings or communications of me making statements concerning a number of athletes and that al jazeera plans to array program about them. in the record -- any were made without my knowledge or consent. it is my belief that an individual named liam collins secretly made those recordings. liam is a fraudster banned in the united kingdom. the statements on any recordings or communications that al jazeera plans to air are absolutely false and incorrect. to be clear: i am recanting any such statements and there is no truth to any statement of mine thattays plans to air. under no circumstances should any of those statements, recordings o, or communications be aired. >> al jaz