>> they spent several months in a cell together. they did in top bunk, bottom bunk. >> reporter: prosecution investigator jason newlin talked to folsom in the county lockup. >> we got along with each other. we're both the same age. um, and we just hit it off real good. >> i believe the information he provided me was credible. >> reporter: and here was the story folsom said he got from dr. frasch -- on the day she died, samira discovered her husband had been texting another woman and she, hurt and angry, lost her temper, started a fight and ended up at the bottom of the pool. >> reporter: now on day three of adam frasch's trial, dale folsom raised his right hand, swore to tell the truth, and told that story to the jury. >> she started a fight that night, kicked him in the back. >> folsom's testimony about the fight between adam and samira was vivid and rich with detail. >> he defended himself pretty much. he thought they were fighting,