dawn and james both. we were finding reasons to take them to jail. reporter: and while they had james, they asked him pointblank about the murder of ben oxley. did i kill ben? no. do i know who kill ben? no. did dawn kill ben? no. do i know anything about the murder? no. were you and dawn involved in any way in the planning of the murder of ben? no. i m looking you in your eyes. i did not kill him. reporter: but that was it. lots of denials. no real evidence. a year and a half had gone by since the murder. it was the summer of 2009. on to cold case territory. getting there. reporter: then one afternoon, as detective elgis was recovering from a night on the graveyard shift, his cell phone rang. it was dawn oxley. she basically said she couldn t take it anymore and she wanted to talk. what were you thinking on the way to see her? it s about time. reporter: the detective drove over to dawn s house. she was inebriated.
dawn and james both. we were finding reasons to take them to jail. reporter: and while they had james, they asked him pointblank about the murder of ben oxley. did i kill ben? no. do i know who kill ben? no. did dawn kill ben? no. do i know anything about the murder? no. were you and dawn involved in any way in the planning of the murder of ben? no. i m looking you in your eyes. i did not kill him. reporter: but that was it. lots of denials. no real evidence. a year and a half had gone by since the murder. it was the summer of 2009. on to cold case territory. getting there. reporter: then one afternoon, as detective elgis was recovering from a night on the graveyard shift, his cell phone rang. it was dawn oxley. she basically said she couldn t take it anymore and she wanted to talk. what were you thinking on the way to see her? it s about time. reporter: the detective drove over to dawn s house.