A Collin County jury found Karmelo Anthony, 19, guilty of murder following three hours of deliberation in June.
Some members of Tupac Shakur's family stepped out of the courtroom before prosecutors showed photos from his 1996 autopsy.
Lindsay Clancy was "begging for help" as her mental health deteriorated in the months before she killed her three children, her former mother-in-law testified.
Attorneys general from California, Colorado, Kentucky and New Jersey are seeking extensive financial damages plus changes to how the company operates Facebook and Instagram.
With Cassandra Michael now convicted, the next step in the case is a disposition hearing, which will serve as her sentencing.