colleagues on the network of nbc news. goodnight. >> it's like a sadness. you can't sleep. it just kind of consumes you. and even when you can move on. you just never forget. someone who's really left such an impact on your life. >> she was a really good mom. she really loved her kids. she was >> -- she was just 20 steps from her front door. she never made it. >> you can explain what happened in those 20 steps. >> it didn't make sense to me. >> a working mom murdered. >> it's hard for me to imagine why someone would be capable of something like that. >> police started with the men