A search on the Internet Movie Database doesn't bring up much information on Debra, but you can find her biography at http://us.imdb.com/Bio?McMichael,+Debra
So far her only movie role has been a small part in Texas Chainsaw Masacre IV, playing the part of a policewoman. Since I don't watch horror films, I have no idea what happens to her but I'm betting her character was killed off. Don't be fooled by the IMBD's "photo gallery" link — it's one picture, linked to the old WWF.com site :P