Lawyers say that cocaine was found on the hair of the captain of the Coasta Concordia, CBS reported.
The ship capsized in January off of the coast of Italy, killing 32 pepople and over 15 remain missing.
Although traces of cocaine were found on the Francesco Schettino's hair, no traces of the drug were found in urine samples or within the hair, which would indicate that he took the drug.
Codacon, a consumer protection group in Italy, announced that Schettino told authorities he had taken tranquilizers, the Huffington Post reported.
Court experts and Codacon believe that the hair samples may have been badly preserved, or that the samples could have been switched.