lives for something good. they stood up and they did what they were supposed to, and they died for it. >> this is my chance to tell you the story of the murders of mike and cynthia mcclelland. >> prosecutor bill wirskye thought if he could prove eric williams had killed cynthia, that would obviously show he killed mike. >> you'll hear the story of a massive law enforcement investigation -- state, local, federal agencies working together to build an airtight case. >> one of the first witnesses called -- c.j. tomlinson, dallas police officer and friend of the mcclellands. c.j. told the jury how he and his parents found the mcclellands. >> i took a couple more steps inside the residence, i was hollering for mike. "mike, mike!" >> for three days, prosecutors brought a blizzard of witnesses. they told the jury williams had