Paul Joyal, who we interviewed for the "Dateline" report "The Last Days of a Secret Agent" was shot Thursday night as he got out of his car in front of his house in Adelphi, Md.

Investigators in Prince Georges County say a witness claims to have seen two men running away after the shooting. Joyal remains hospitalized with a gunshot wound to the midsection. Authorities have not said whether they've been able to talk to him.

Joyal is a long-time consultant on security and Russian affairs. From 1980 to 1989, he was director of security for the Senate Intelligence Committee.

On last weekend's report, he said of Litvenenko's death: "A message has been communicated to anyone who wants to speak out against the Kremlin: 'If you do, no matter who you are, where you are, we will find you and we will silence you — in the most horrible way possible.'"

The shooting has certainly raised eyebrows, because Maryland police are well aware of Joyal's views regarding the Litvinenko death. But at this point, they have no evidence suggesting this was anything other than an example of the rising crime rate in Washington's Maryland suburbs. Click here to read more from NBC's Pete Williams.

Click here to read a transcript of Sunday's report.