we need all of them to collect it. dna doesn't lie. you get to the truth so much sooner. it saves money. it saves lives. >> reporter: samantha channeled her grief. she's a 911 operator now. >> 911. what's the location of your emergency? >> so when you have somebody on the other end of the line who is calling in because they just found out that somebody had died and they need to know what happened, i feel that pain. i know that pain. >> reporter: as for bonnie's three sons, his mission is more personal. >> it changes the way i raise my kids.ime to make sure that they're understanding why things are done certain ways or what builds character, what really is important in life. >> reporter: sounds like you're trying to grow some more bonnies. >> maybe. >> reporter: you miss her a lot, don't you? does the ache ever go away?