I have a few questions, I am not trying to be offensive with any of them but I have some questions I need to ask.
Were your mom and dad Married?
How was their marriage?
Is your dad an easy going man, or does he have a temper?
Have you spoken to anyone who worked at the diner where your mother worked?
Where did she work?
What was the name of the diner, where was it located, is it still standing, in operation, who owns it, is it the same owner?
Is it possible your mother never worked there and was getting $ some other way? I hate to ask, but you are telling us that someone was killing prostitutes, so I feel I have to ask.
Are you your mother's only child, were there older children?
Is it possible, that your mother was having an affair?
How old was your mother when she died?
What color hair/eyes did she have?
Height/Weight? Dont need exact, you could say thin/heavy/medium build, tall/short/medium height?
Can you talk with family members like your dad/her mom/etc? If so can you ask them, did she seem nervous going to work or coming home? Did she ever mention someone hitting on her, someone stalking her, someone following her? Someone flirting with her, or sitting in her section all the time? Maybe someone was asking for a table where she would be serving everytime they came on? Maybe she mentioned someone who consistently tipped her a LOT, or someone handing her little gifts or something? Even if it was something SHE seemed totally unconcerned with it could be a help. A guy maybe was giviing her huge tips and she was like "Yeah he is always so nice to me and gives me big tips", but the he could have been someone who was obsessed with her. Or an old man who always joked around about them running away together. Anything is a place to start.
I think step 1 is to find out about the other waitresses who worked with your mother. So that means we have to go back and look at the place she was working. Find out if the owner and other waitresses who worked during the years your mom worked are still alive and willing to speak with us. If you want to PM me, go ahead. I never ever have asked for a dime, but I try to help where I can. G/L.