The evidence is very clear that Christine road her bike to the store and returned home, where the bike was found.While there is no "proof" of her abduction from home, there is very strong indications of such. For example, her coat that she was known to be wearing when she left school and had on at the store was found in the house ---hung on a hook that was too high for her to have reached herself. Her bicycle was haphazardly tossed on it's side Christine apparently used to kick-stand it up). Here's a source from last year's article on the 35th anniversary of her murder ...
MANDEL: After 35 years, family demands ... Who killed Christine Jessop? | Toronto Sun
And a more recent one:
'It all fits': Christine Jessop’s brother, Kenney, shares theory on how his sister was abducted by Calvin Hoover
Her family has insisted for years that it had to be someone who knew she'd be home by herself that afternoon after school. IMO, I think he was waiting inside for her ... with a ready story about taking her to see her dad.
During the prosecution of Guy Paul Morin, his lawyers (Ruby, Pinkofsky and Lockyer) floated many alternative scenarios because they pointed away from Guy Paul Morin. This is quite proper; it was their their job as defence lawyers who "test the evidence". However, if all these scenarios are deemed equally probable, the perverse result could be to make it impossible to confirm that Calvin Hoover committed the murder.
It is important to distinguish "defence scenarios" from the plain meaning of the evidence, which is that Christine was abducted from her home or its immediate vicinity after returning from the store, and that she was taken directly to the place where her body was found and murdered there. This should be (and I am very confident, IS) the premise for the efforts of the Toronto Police in to confirm that Hoover murdered Christine.