>> dr. poseyly he was. >> without a doubt. >> reporter: but don't forget, the defense has its own star forensic pathologist on standby, dr. michael baden. >> i expected to go out there. i was told i was going to go out and testify. >> reporter: but as the trial progresses, bohana and his family, including ex-wife sheila, whom he's still close to, are mystified. where is dr. baden? >> why isn't he calling dr. baden? everybody else put on their people. >> reporter: you think dr. baden would have made a difference? >> oh, indeed. the world's greatest pathologist? my gosh. >> reporter: but harlan braun never calls dr. baden. in fact, braun doesn't call a single expert witness. and in a curious gamble, he decides to put the defendant don bohana himself on the stand. >> every defense attorney knows how risky it is to call a defendant to the witness stand. >> reporter: sure enough, the prosecutor takes apart bohana for his drunken actions that morning, like blurting out the wrong address to 911 and sayin