Milian Dula's family says in her short life, the talented and inquisitive girl taught them how to love unconditionally and find beauty in simple things.
"The Cosby Show" actor's widow, Dr. Tenisha Delilah Warner, is taking legal action against his mother, Pamela Warner.
The victims included two women and three men, authorities said.
Police allege the suspects discarded the 18-year-old's cellphone and clothing after his death at Lake Ray Hubbard.
Several people reported that the boy seemed to be gasping for air, police said.
Kiara Paolasin, 6, was with her family at the time