. >> in 2013, keefe greer filed a civil wrongful death suit on behalf of the zahau family.dina defended along with her twin sister nina. there was also third defendant, the man who called 9-1-1, jonas brother, adam shacknai. did you have anything to do with rebecca's death? >> absolutely not. >> he disagreed. he pointed to those not tight around rebecca's race and feet. >> figuring out in the first place is hard, tying them almost impossible. >> he believed whoever tied the knot had to be an expert, possibly a sailor. and adam shacknai worked on the mississippi river as a tugboat captain. >> when he ties things off he uses a figure eight, and then closes it with a single hitch or to, guess would not's are tied on both her legs and her hands? figure eights, tied off with a single hitch or to. >> sheriffs investigators had question extensively after rebecca's death. you didn't hold anything back from investigators? >> nothing. >> you help them to the extent that you could? >> yeah, exhaustively. >> you thought you had nothing to hide? >> i knew i had nothing to hide. >> and w