Heyy,thanks for the reply.No,this is my first time doing the mission and I haven't seen her anywhere else..
Heya! Just like the other person in these comments said, there's hidden areas along the walls that should open up once you find them. Just kinda walk along each wall, cause I forgot where they all are, but one leads to Linda somewhere towards the bottom left. Once you find her there, she can help you two escape.