Well I think we know that he was divorced in 95? is that right? so, is that about the time that kidnappings picked up around the area? I do agree that there had to be more, especially since family members are having "ah ha" moments now regarding locks and off limit areas of the home.
Who knows-- maybe around 2000 he started becoming attached to his victims. It appears he kept a journal and who knows when that started but maybe it started around the time he was keeping his victims.
I'm jumping off your post, which got me to thinking... just going to list some dates here for further pondering:
"Mr Castro would frequently lock Figueroa in an apartment in which they lived
after they met, the Associated Press quoted her father, Ismail Figueroa, as saying.
It also quoted Figueroa's brother-in-law, Angel Villanueva, as saying Mr Castro refused to let people visit the house they
later moved into on Seymour Avenue, and only let Figueroa out if she was with him.
Figueroa's sister, Elida Caraballo, told Britain's Daily Telegraph that Mr Castro
locked Figueroa in a box in the house, beat her frequently, and knocked her down the stairs. "
"Ariel Castro was born in the US territory of Puerto Rico, and had owned the home on Seymour Avenue since
1992. "
"A local broadcaster reported that he had been arrested and charged with domestic abuse in
1993, but the charge was later dropped."
"The suspect's former wife, Grimilda Figueroa - who died last year - moved herself and three children out of the house in
1996 after years of violent abuse, said the couple's son, Anthony Castro, 31, a banker in Cincinnati, Ohio.
"I was beaten as well," Mr Castro told the UK's Daily Mail newspaper."
http://www.bbc.co.uk/news/world-us-canada-22444882
[August,
2002 - Michelle Knight, a special education student, is abducted]
[April,
2003 - Amanda Berry is abducted]
[April,
2004 - Gina DeJesus, a special education student, is abducted]
"According to school board records, in
2004, he left a
special-education student alone in a parked bus while he grabbed a burger."
"Although Mr Castro and Ms Figueroa divorced more than a decade ago, court records show he was accused in
2005 of attacking his former wife."
Boy it's tough to keep all this stuff straight. This seems to be a good start though. Anyone who wants to help build a timeline, feel free to use this stuff and/or add to it or whatever!