The FBI is joining the investigation:
https://www.mysanantonio.com/news/local/crime/article/FBI-assisting-Bexar-County-Sheriff-s-Office-in-13553110.phpQuote:
The FBI is joining the investigation into the shooting deaths of a mother and her two children in a luxury San Antonio-area home, officials with the Bexar County Sheriff's Office announced Tuesday.
At the request of Sheriff Javier Salazar, the bureau will provide technical and investigative assistance while deputies determine what led to the deaths of Nichol Olsen, 37, and her daughters, 16-year-old Alexa Montez and 10-year-old London Bribiescas, the sheriff's office said in a news release on Tuesday, adding authorities would leave "no stone unturned."