Related
Tianna Thomas turned herself in last week to police just a day after they held a news conference naming her as their primary suspect, urging her to turn herself in.
Authorities say on Aug. 19, women from two rival groups met up in Brewerytown and a fight broke out. A video shows a woman police believe to be Thomas repeatedly stabbing 23-year-old Shawntae Garrison. Garrison later died at Jefferson University Hospital from her injuries.
Garrison's 28-year-old sister was critically wounded.
The 19-year-old is set to face a judge for her preliminary hearing next month on murder and attempted murder charges.