GHB will kill you if your given enough of it - Google it - it is pretty scary stuff. They may have gave her too much. It also can be made at home. Deepak may have dealt in GHB.
You're right, Brigette. Too much can kill.
Read about GHB here.
GHB
COMMON & BRAND NAMESG; Sodium Oxybate EFFECTS
CLASSIFICATION Depressant Intoxicant CHEMICAL NAME gamma-hydroxybutyrate DESCRIPTION
GHB is a sedative used both as a sleep-aid and as a recreational intoxicant. It is known for its ability to induce a short (several hour) coma-like sleep at high doses. A number of GHB-related deaths in combination with its addiction potential led to it being made illegal in 1999.
CAUTION
GHB's dose/response curve is similar to that of alcohol : At higher doses, users fall unconscious and are temporarily unable to be awakened (coma). It may also dangerously depress breathing. Avoid Mixing With Alcohol.