Unless an offence is successfully committed, there is no question of abetment 

For the offence of abetment to be established, the abettor should have been proved to have done something at the time.

For the offence of abetment to be established, the abettor should have been proved to have done something at the time of commission of the offence itself to help its commission. (e) A returns a licenses weapon belonging to B on his demand with which B commits a murder. A is liable or abetment.