Hmm, I don't understand this story and links here. Why would a very successful person with family commit suicide over police-brutality? No comprendo. The appropriate response would be to get even through a court of law, or even paying to have some legs broken if it were justified. Perhaps he was depressed or mentally ill?
There has to be something else going on when a person is confronted by the police and they decide to arrest you. I can only imagine that he was agitated somehow and may have been either mentally unstable or intoxicated. Suicide is not a normal response to being locked up by the police for a few hours.
Ian is a well-known quantity, and what we know is that he was extraordinarily kind and generous. I don't believe for a second that he did anything to deserve to have a police officer beat him up. Not all police are vicious bullies, but I'm more willing to believe Ian had the misfortune to cross paths with a vicious bully than I am to believe he deserved being beaten up.