User blog comment:AltertheSilverBird/Total Drama: Danganronpa./@comment-2212492-20151226093520/@comment-2212492-20151227035826

While it seems plausible, I don't think Gwen or Trent committed the crime because they kept Staci's attempt at suicide as a secret and talked her out of it. If they wanted her dead, they would've let her do it then and there.

She couldn't have drowned because I don't think any of the killers would be strong enough to lift her out of the water by themselves and bring her to the shed. Although water was in some way involved, if the shed in question was the boathouse.