"Somebody is not telling the truth here," Hardin said. "There may be some information we may not have out there. Roger just totally believeably denies the whole thing. We start looking at it -- how can this happen?
"To our surprise, we have identified several people who logic dictates the Mitchell team should have talked to but did not. That's troubling.
"There are people to talk to that were not by the Mitchell Commission. I'm increasingly surprised with the people and issues that were not looked at. I am blatantly, in the most self-serving fashion possible, urging the media to do the same thing."
The New York Times reported in Thursday's editions that Hardin has hired private investigators to challenge McNamee's credibility. The paper also reported that the investigators may have a tape of McNamee contradicting the details attributed to him in the Mitchell Report, though whether that tape was made before or after McNamee met with Mitchell is unclear.
On Sunday, Hardin met with local reporters at his Houston office and said he is considering filing a lawsuit against those involved with the Mitchell Report, including McNamee, as well as the Los Angeles Times, which in October 2006 falsely identified Clemens as being named in the Jason Grimsley affidavit.
"When I was asked about it the first time, I said I didn't think [filing a lawsuit] made much sense," Hardin said on Sunday. "[Clemens is] a public figure and the standard is much higher as to what you would have to prove to succeed. But I have to tell you, we're moving more and more in the direction of considering [a lawsuit] now, in spite of it.
"I would say simply that's a possibility. No decision has been made about it. Quite frankly, the decisions about lawsuits and stuff will come later. We'll get this initial thing out of the way, we'll let everybody talk to him and ask him questions about whatever they want and then we'll figure out where to go from there."
Prior to leaving for a holiday vacation, Clemens issued a one-minute, 48-second video denying all allegations of steroid use stemming from the recently-released Mitchell Report.
In the video, which was posted on Sunday on rogerclemensonline.com and youtube.com, Clemens vehemently denied ever taking steroids or human growth hormone.
"Let me be clear -- the answer is no, I did not use steroids, human growth hormone, and I've never done so," Clemens said. "I did not provide Brian McNamee with any drugs to inject into my body. Brian McNamee did not inject steroids or human growth hormone into my body, either when I played in Toronto for the Blue Jays, or the New York Yankees. This report is simply not true.
"I'm angry about it. It's hurtful to me and my family. But we are coming upon Christmas now and I have been blessed in my life. I've been blessed in my career and I'm very thankful for those blessings."
On Dec. 13, Clemens was identified in the Mitchell Report as having used steroids in 1998 and 2000. McNamee, Clemens' former personal trainer, told Mitchell's investigative team that he injected Clemens with the steroid Winstrol through the end of the 1998 season and that Clemens' performance "showed remarkable improvement." During the 2000 season, Clemens reportedly went back to McNamee and said he was "ready to use steroids again."
During the latter part of the 2000 regular season, McNamee said he injected Clemens "in the buttocks four to six times with testosterone from a bottle labeled either Sustanon 250 or Deca-Durabolin" that McNamee had received from Kirk Radomski, the former Mets clubhouse attendant who is also named in the report.