Aishwarya's family from Hyderabad is said to be in touch with a few organizations and Indian officials in the United States to bring the body back home.
The six-year-old girl was forced to perform the sex act by male students in her classroom in the presence of the teacher, who was working with other students at the time.
Garcia's customized message asks his parents for money instead of the customary "leave your name and number" and stresses to his provider that his cell phone bill is already paid.
The Democrat, who is the nephew of the slain US resident, said the country's premier investigation agency was involved in the murder, and in the cover-up after that.