Christian Montero, a 35-year-old man from Lawrence, Massachusetts, is facing upgraded murder charges in the death of his neighbor, 37-year-old Carol Flaz-Burgos. Flaz-Burgos was reported missing on August 31 and was found dead on September 3 in a wooded area near Kenoza Lake. Surveillance footage captured Flaz-Burgos entering Montero's apartment shortly before her disappearance, and cell phone data linked Montero to her location during the time she went missing. Initially charged with witness intimidation and misleading investigators, the murder charge was added following the autopsy results. Montero has been held without bail since his arrest and is scheduled for arraignment on the murder charge. The investigation is ongoing, and concerns remain within the local community regarding safety and trust in neighbors.