Killers can look like anyone.
I read a book about ted Bundy once. A couple of the women who survived being with him (very few) , said they trusted him and got into his car: because he looked like a nice, normal well dressed man.
Actually one woman said something interesting.
She said she was at her college. And it was raining. She had an umbrella. Ted Bundy approached her and asked could she walk him to his car so he could shelter under her unbrella. She said yes as she wanted to be a good Samaritan. She said that he looked like a nice normal gentleman.
He began to walk to a very far away car space and she began to think that she wanted to get back to class. It was daytime. She said that all of a sudden she got an overwhelming gut instinct that something bad was about to happen, and she turned and ran quickly away from him.
She said she ran a far way across the campus and then looked back at him. He said "you forgot your umbrella", and she said "you can keep it, it's ok".
Then she went into the college, and she said that she was a bit embarrassed at her reaction. That she had wanted to be kind to people and she thought she had been a bit unkind to the man.
Then she forgot about it. Until later, she saw his face on the news . He was Ted Bundy.
Always trust your gut instinct. No matter how nice normal and smart people look