Dickinson police say Madison Frazer was shot in the back at a home in the 4800 block of E. 33rd Street just after 3:30 a.m. Tuesday.
She was sent to HCA Houston Healthcare Clear Lake, where she later died due to her injuries.
Overnight, police provided the update that two female juveniles are now in custody, charged with tampering and fabrication of physical evidence.
ORIGINAL STORY: Who killed this 19-year-old woman in Dickinson?
The suspects' names and ages have not been released. They are both being held at the Juvenile Justice Center in Texas City.
Police say more charges may be filed as the investigation continues. It is unclear what exactly led up to the shooting.
Detectives are urging anyone with information to contact the Dickinson Police Department at 281-337-4700 or Galveston County Crime Stoppers at 409-763-8477.