gamebreaking bug The Distress Signal, Key card Bug

[Dylan Pope]

I have run into a bug with Porter on the Distress Signal quest where I killed Cassandra before talking to him about the key card and he now just gives me dialog about the reward and there is no way for me to get the key card to get access to the room with the research leaving me with no choice but to save up the 10,000 credits just to continue the story. (I would provide a picture of the incident but the file is apparently too big)