Plastic bags was the term used in that article, and from that I can only speculate that the bags were the large trash or leaf bags that many keep in their kitchens. Yes, someone could have gone home to get bags, someone could could have bought them, or someone could have brought them. Odds may be that the bags came from her apartment as others suggest. In that case it is possible that someone could have gone to her apartment to get bags after she was killed.
But, why go through the trouble and take the risk of going back to her apartment to get bags to wrap her body in? And, if someone went home or to the store to get bags it would have been risky going back to wrap her body, too. There have been cases that I vaguely recall where someone actually did that. But, if it has happened it is very rare. This plastic bag issue has me thinking.
Also, I was thinking that it is possible that the person who wrapped Leah's body may have wanted to cover her up and not leave her laying without being covered. If there there is any truth to this, and I am just speculating, then it suggests remorse and a possible previous emotional connection.
Lion