'Porch Shooting' Trial: Theodore Wafer Takes the Stand

Detroit-area man accused of murdering Renisha McBride, an unarmed teenage girl, describes the night of the incident.
4:13 | 08/05/14

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Transcript for 'Porch Shooting' Trial: Theodore Wafer Takes the Stand
The latest on the trial of a Michigan man charged with murder for shooting an unarmed teen on his porch. Theodore wafer will be back on the stand this morning after an emotional first day of testimony. ABC's Ryan smith is tracking the case. Good morning, Ryan. Reporter: Good morning, George. With the defense's case nearly complete they offered up their final and most important witness yet, wafer himself and he told the jury what he heard and saw the night of the shooting and how he felt about killing the teenager. I wasn't going to cower in my house. I didn't want to be a victim. Reporter: Theodore wafer, the man accused of gunning down an unarmed 19-year-old, renisha Mcbride, taking the stand in his own defense Monday. Why did you pull the trigger? To defend myself. Reporter: Wiping away tears. This poor girl, she had her whole life in front of her. I took that from her. Reporter: Prosecutors charged wafer with second degree murder claiming he shot and killed miss Mcbride after she showed up at his home following a nearby car crash. The defense claiming wafer fired his 12 gauge shotgun in self-defense. When Mcbride banged on his door intoxicated in the mid of the night. Wafer testifying that crime is a problem in his neighborhood. A neighbor across the street had to actually hold off three guys with his handgun. Reporter: Leading him to buy a shotgun. I just heard it was a good home defense weapon. Reporter: The 55-year-old claims the fast-moving situation forced had him to act quickly. How fast is this happening to you? Seconds. Why didn't you call 911 before shooting a weapon? I couldn't find my cell phone. Reporter: But prosecutors doubting his motives and questioning those tears on the witness stand. Do you remember ever crying within 2 1/2 to 3 hours after you shot renisha Mcbride? No, I don't think so. You didn't cry, right? I don't think I did. There's no jury there at the time you were talking to lieutenant serwatowski, right? Argument, your honor. Reporter: He thought multiple people were outside his house and he thought they wanted to hurt him and despite loading the shotgun a month before he didn't remember it was loaded until after the shooting. He'll continue to face cross-examination today and if convicted of second degree murder he faces life in prison, George. O. Ryan, thanks very much. Dan Abrams with us right now and, Dan, you saw the prosecutors questioning his demeanor on the stand. How important is that. Typically I say demeanor doesn't tend to mean that much. In this particular case with the defendant on the stand it means a lot. This case comes down to his testimony. This case comes down to can they believe him? Do they believe his account and can they most importantly put themselves in his position and understand why he says it was reasonable to do what he did and so it goes to credibility, right? And then picking up from that I guess the most important thing for him has to be to make sure he's got a rock solid story. And that it doesn't vary too much from what he told police, right? He gave an entire statement to the police of what happened. It's all on tape. Prosecutors have just played it in court. The key for him has been, don't vary too much from that account because that goes to credibility and so far he hasn't too much. But prosecutors are going to pick away at certain discrepancies and they're going to say, this shows you that he is telling a different story now than he did before. And one of the discrepancies between the prosecution and the defense is the distance he was from the vic. Right. The defense is trying to say he was very, very close when the shot occurred. In essence trying to suggest that maybe she was trying to break into the house. Prosecutors are saying, no, no, no. There were a number of feet here between this and this was effectively an execution. Meaning he had time to prepare, cocks the gun, points the gun, he's feet away, shoots the gun. Defense wants to say this is feckly combat as it was happening and so he didn't have the time to think about that. Okay, Dan Abrams, thanks very much.

This transcript has been automatically generated and may not be 100% accurate.

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