poor man was killed by a police Taser. Now there are claims it was mistaken identity.
Why was he Tasered anyway? The police claimed they would only be used in situations where lives were at risk.
Even if it was someone they were looking for, the police must be warned very strongly that Tasers are not toys. They can be lethal. An officer who uses a Taser can't tell whether someone has a heart condition, or other vulnerability.
In civil law, negligence works on the basis of 'take your victim as you find him' - i.e. if someone dies from a blow because they have an exceptionally thin skull, that doesn't reduce your negligence. You chose to hit him or her or do whatever it is that was wrong - it's your look-out if that action has consequences you didn't expect. Same should apply here.