Drug possession is an offense by someone holding controlled substances for personal use and can be charged as a felony.
In order to prove possession, the prosecution must prove the following:
You were in possession of a controlled (illegal) drug
You knew, or should have known you had it and that it was illegal
You had control over the location and presence of the drug
Depending on the degree of the charges, the penalties for being caught in possession of illegal drugs can be very severe.