for other scientists to create an electric car with rechargeable batteries, then the american william morrison assembles a six-seater electric car that could travel more than twenty kilometers. the world saw this car in 1893 at an exhibition in chicago and in 1912 , two companions of henry forte thomas edison decided to fill the entire market with high-quality and inexpensive electric machines, according to historians who study the biography of the creators, friends, in the strictest secrecy. worked in laboratories, however, rumors about the development. yet dispersed and ford. i had to give an interview. the new york times, in which he said that a ford car with new batteries under the edison brand was being prepared for release. however , the plan was not condemned to come true, the fire destroyed the edison laboratory with all the documentation, and henry ford began to produce cars with a gasoline engine. this story was the end of the first stage in the development of electric cars until the nineties of the last century. it was when oil began to grow, in addition, scientists began to serious

keith morrison: --a new explanation that not everyone was buying. william styler said that. orgive you for? when dateline continues. keith morrison: a full confession, the best possible solution for a murder case, if they could believe it that is. keith morrison: but are you comfortable with that explanation of this crime? are you comfortable that that is the whole thing? i don't know if we'll ever know the whole thing. keith morrison: around the pitkin county da's office was a nagging worry. dr. trey styler demanded, and the da approved, a quid pro quo, his full confession in exchange for his wife's unconditional release. keith morrison: but what if he was lying? how would they ever prove it? we had no facts to refute his statement to me. we weren't in that room that night that nancy pfister was murdered, so we had no facts to refute what william styler was saying. so you're saying to me that kathy carpenter and nancy styler are both innocent, neither one participated in this crime. william styler said that. i'm not saying that. keith morrison: but despite investigator mille

keith morrison: daniel william, as was his right, sweet!han and accused him of committing the murder. of course he didn't have to, his attorney did it for him. it was not a surprise to prosecutor julie mitchell. >> they said it could've been nathan and could have been a random person. and that by the time states is done with its case you won't be able to know who did the crime, they just don't have evidence. it's a pretty good strategy. >> yes. >> it's the only strategy. this wasn't a self-defense case. and it was an insanity case. >> no. >> it had to be somebody else. >> make sense, again did he have blood, no, dna? no. >> what they had in their pocket, my star witness is the boyfriend who we knew the girlfriend was thinking about breaking up with who happened to be obsessed with knives -- >> and oh, by the way he is appearing online in a ninja costume for heaven sakes. >> when he was cross-examined by the defense they left out the picture with him with the mask on up on the screen. >> you worry a little bit, i would think? and that just h