After new mom Mamta Kafle went missing, crime scene investigators used a chemical in her home that illuminates blue wherever blood is detected. They flicked off the lights and “the room lit up,” the lead detective testified in Naresh Bhatt’s murder trial. ⁠ ⁠ News4’s Drew Wilder reports.⁠ ⁠ #washingtondc #maryland #virginia #pgcounty #dc #districtofcolumbia #dmv #northernvirginia #alexandriava #northernva #arlingtonva #fairfaxcounty #nova #md #mocomd #pgcountymd