but as shock set in, leads poured in. witnesses reported strangers lurking. a car speeding through the neighborhood. and there were footprints out behind the house. putting alarms on every door because somebody is out there. but detectives, they decided the killer wasn t out there, but inside the house. now, with one of their own under arrest, the family was furious. you see these people, this is love. this is belief. this is human being. please listen to us. then investigators rush to judgment. do you have any idea, beyond your own fevered imaginations that happened? you don t have a clue! i think i do have a clue. was the real clear lure still out there? hello, and welcome to the line. and unexplained death can free even the strongest family of ties. but when tragedy struck the buenos household, grief pulled them closer. the crime scene seemed to tell one story. but as investigators look deeper, they wondered if this loving family had a killer in their mitts
. you of. for midnight eastern time. one person is in custody. now, stay with msnbc for the latest updates on the breaking news story. now back to dateline. test updates on the breaking news welcome back to dateline, i m craig melvin. karen duenas was brutally murdered leaving her loved ones devastated. adding to their grief s, where investigators suspicion that her husband was involved. mark told detectives he had a secret phone relationship with the former high school crush, and that karen was upset when she found out. now, another surprise was about to jolt the duenas family.