I have a before trigger running on Cases where I am checking a few fields for changes, and notifying the Case Contact owner via email.

I am using trigger.new and grabbing the LastModifiedById from the record, but it seems to be the previous person who made the update (the old record value) not the person who just made the update (the new record value).

Is that field updated after the record is committed? And if so, how can I find out who made the changes to the record so I can include it in my notification?