If they are as competent at ‘deleting’ files and emails as they are when advising ‘pimps and hookers’, a forensic investigator will retrieve those in no time at all. Unless you are very familiar with computers, actually ‘destroying’ files and emails is not very easy.
Nonsense! It's trivial ... all you need is a sledgehammer.
;'}
Oh ... wait. You wanted to still use the disk?
Never Mind ...