Evicting one Nuisance Tenant and Allowing Other to Stay - Domestic Issues.

[Will F.]

I don't like getting involved with stuff like this...

But I have a situation in Los Angeles city where a boyfriend-girlfriend are breaking up.  The boyfriend pays all the bills and wishes to stay. The girlfriend has been a bit of a nuisance-drugs, noise, police called etc.

The boyfriend wishes to stay and want's me to step in and possibly evict her.

Would a 3-day work in this case for Nuisance?  Or would a 30 day notice just served to her work better?

I really hate this part of owning property.