Kumiko Kosaka had been on the run for more than 1 month
TokyoReporter
Prior to incident, student said he was 'worried about repeating a year'
Suspicious person wearing red hat and black top caught on security camera footage
Note found in bag hinted at relationship problems
Incident could be connected to separate stabbing in late April
Trio were on the way to bank to investigate unaccounted for expenditures
Charged exorbitant sums at nightlife locations in Nara and Osaka's Kita Shinchi area
Osamu Yano has confessed to killing Mamoru Saito, who went missing in 1998
Scouts often solicit women by claiming to be from modeling agencies
Court cited lack of evidence