>> reporter: democratic state senator john whitmire, who chairs the texas senate criminal justice committee, sponsored the junk science bill. he says his state's reckoning with d.n.a. testing paved the way for the law. since 1993, texas has exonerated 57 people, mostly convicted of murder and sexual assault, who appealed with d.n.a. evidence. the highest number of any state. whitmire says that was a moral wake up call. >> i hope it keeps everybody up at night if they think one person is wrongfully convicted. junk science has proven we have numerous people, maybe large numbers nationwide, wrongfully convicted. >> reporter: when texas adopted its junk science law in 2013, it was the first in the nation. last year, california, became the second. junk science appeals are finally making it onto court calendars in texas, but there is no deadline for decisions. >> reporter: so far, only one case has resulted in a new trial. a handful of other cases, including sonia cacy's are waiting to be heard. >> reporter: but the number is

whitmire says that was a moral wake up call. >> i hope it keeps everybody up at night if they think one person is wrongfully convicted. junk science has proven we have numerous people, maybe large numbers nationwide, wrongfully convicted. >> reporter: when texas adopted its junk science law in 2013, it was the first in the nation. last year, california, became the second. junk science appeals are finally making it onto court calendars in texas, but there is no deadline for decisions. >> reporter: so far, only one case has resulted in a new trial. a handful of other cases, including sonia cacy's are waiting to be heard. >> reporter: but the number is expected to increase, because of the work of the texas forensic science commission, a group of seven scientists and two attorneys appointed by the governor. they investigate the integrity of forensic analysis at crime labs and set guidelines about what is solid forensic science for judges, who ultimately decide what evidence a jury sees. in february, the commission recommended that bite mark evidence should stay out of courtrooms, because th

yes, said whitmire. mao seem to be caught by surprise, we cannot say that the chinese communist troops killed him or not. if this is true that the communist troops shot this american officer, i asked him my deepest apology. i would like would like assurance that this will not occur again, demanded we do meyer. i would like assurance that this will not occur again. i cannot have americans killed in by chinese communists or by anyone else. i am directed by the president of the states to use whatever force i require to protect american lives in china. so you can see this is a very intense conversation. the record of this is in the national archives in college park. now, mao was apologetic at the time but subsequently he was angry, he felt humiliated about the way he had been lectured by mouth. at this point in time the united states position is to try to maintain some neutrality which of course is impossible because the states recognize the nationalist to the republic of china. the u.s. is trying to not get