In countries with proper judicial systems and smart legal minds, the driver and the bodyguard would have been given plea bargains - maybe sentences reduced by up to 70% or suspended - in exchange for their cooperation i.e. they spill the beans and testify against the chief pharmacist. US got Al Capone on tax evasion. If you can use a 'minor' crime to get a pharmacist behind bars for a couple of years, you would disrupt his system to a very great extent and it might even become easier to build a case on the more serious charges. Witnesses might even be more willing to cooperate.
This being Kenya though, the driver and bodyguard will be prosecuted as if they were just relaxing one evening a decided "What the heck, let us shoot up our employer's car and make a report to the police that we were shot at.".
@Wakandi - You don't need to be smart to be a pharmacist. All you need is the right connections, tonnes of money [which will definitely come from the 'business'], and an overdose of ruthlessness. If you know the right people, have enough cash and can kill your own brother if he was a risk to your 'business' then you are qualified to be a pharmacist!!!
Never count on making a good sale. Have the purchase price be so attractive that even a mediocre sale gives good returns.