Mindy, how awful for you. Especially you walking in and finding her. That's very traumatic, and I hope you're talking to someone about it. I hope you and other employees have some kind of memorial at work. Talk about Louise, and how each of you experienced her. Tell favorite stories that involved her. Then all go to lunch at a place she liked. Decide on a charity donation in her name. I presume you all signed a card to the family. Maybe keep some cut flowers at her desk for a few months. But the memorial will provide closure that you all need.
you might want to put that particular desk in storage, and get something else for a new employee. Rearrange the room where she was found, or change its use altogether. Invite the family in for a potluck lunch, even for the memorial. They'll appreciate seeing the space she spent so much time in, and meeting her co-workers. This can be healing for all concerned.
Let me know how you are coping, and what you've done or will do. God bless.
ps. sorry i didn't reply sooner. i was geting married!