When did Barty Crouch, Jr. go over to the Dark Side?

[gryffindor02356 <mrleach74@msn.com>]

No: HPFGUIDX 48728

Having read GoF numerous times, I become further intrigued with Barty 
Jr.'s character, but many questions still remain.  Was he ever good?  
When did he go bad?  Was he a student at Hogwarts?  According to 
Barty, Sr., while under the Imperius Curse, "Yes, my son has recently 
gained 12 OWLs, most satisfactory indeed."  If he was at Hogwarts, 
what house was he in and who were his friends?  It appears that he 
was a little younger than Bertha Jorkins, Snape and the Marauders 
(Moony, Wormtail, Padfoot and Prongs) and was studying there at the 
same time they were.  It seemed that he had much going for him until 
he blew it, going to the Dark Side.  Did he and his father have some 
falling out, which made him go bad?  Was he abused?  Was there a love 
interest that he lost???  I believe that there is a hidden story 
between really young Barty, Jr. and the current Barty, Jr., having 
been exposed as a fraud.  Also, once he received the Dementor's Kiss, 
it was said that he now exists as soulless and evil.  Does that mean 
that Voldemort can still have him on the DE squad?  What exactly 
becomes of Barty Jr.'s character?  Has he been turned into a 
Dementor, being soulless and evil?

Matt aka. gryffindor02356