Could hypnosis solve Dagestan murder?
Aleksandr Bastrykin from Russia's Prosecutor-General's Office says investigators requested the help of experts on reviving human memory.
Abashilov was gunned down in his car. His driver survived the attack and was taken to hospital.
Bastrykin also said that he does not support the idea of creating a unified Federal Service of Investigation, which will work in a similar way to America’s FBI.
He questioned the effectiveness of the possible joined investigative branch and predicted many problems will follow with its creation.
Last week it was reported that already this autumn the new security service will be launched in Russia, which will unify all investigative bodies in the country.