If I kick a member during wars, what happens to the skulls he earned?

Is the alliance gonna lose the skulls he earned on current war only? (900skulls) 

 

…or lose the skulls he earned on all seasons, decreasing our total skull score? 

 

…or none, and all his skulls will stay with us after he leaves? 

 

The skulls he earned in the current war leave with him, the skulls he lost however stay with the other alliance. It has no consequence for already finished wars in that season.