If I moved and gave notice due to family health, my old room mate was served a 5 day pay or quit and is now squatting on the property.

So long as you gave your Landlord timely written notice of your intent to depart (and can show delivery to and/or receipt by the Landlord) and so long as you timely left the premises, you have strong defenses should your Landlord ever decide to pursue you.  The only potential bases which the Landlord might consider pursuing is if the Landlord believed that the roommate was a subtenant of yours and thus you have failed to deliver the premises back to the Landlord.