By this time another customer was entering, and the landlord hinted to me to put the monster out of sight; 

then he bowed me all the way to the door, and I started straight for that house and those brothers, to correct the mistake 

which had been made before the police should hunt me up, and help me do it. 

请教老师，“ before the police should hunt me up”中的should是否属于“推定性”用法，表示一种可能性，如果去掉should,

则 before the police hunt(s) me up 则是陈述语气， 加了should,则说话者认为警察逮到我的可能性降低了，只是有这种可能性。

麻烦老师批评指正。