If you use in when you explan yourself meaning でも~ =But ~だけど though
Therefore exmple will be
”でも~" 壊してないでも壊したと言われる I did not break it but you say broak it
When you objection to say others opinion or saying
”~だけど” それを壊しただけど事故だった I broke it though it is accident
When you admit then you explain the fact.