Install a silencer (the best product is a must, which is related to whether you can be found)
He shot as soon as he got off the bus.
Repeat until the clip is empty.
Dismantle the gun and put it in the bag at once, change clothes and put on sunglasses.
Find a place to hide, don't leave immediately, or you will be targeted immediately, and take some risks until the ambulance and most of the police have left.
Precautions:
Put on disposable gloves, shoot, and then dismantle the gun and hide. Burn the disposable gloves and throw the ashes into the trash can. Put on a new pair of gloves (not disposable). If it is not winter, wearing gloves will be suspected. Pay attention to this.
Prepare shoes without patterns.
Prepare another bag and a change of clothes in advance.
It is best to have cosmetics or toiletries.
Finally, I suggest hiding in the Alps for two days.