One Trail, Two Conclusions; Police and Prosecutors May Never Agree on Who Began Jogger Attack
Article reviews evidence in Central Park jogger case, especially trail that police say shows where jogger was dragged; police and prosecutors are split in their interpretation of evidence, with prosecutors saying size of trail indicates single attacker dragged her, consistent with Matias Reyes's confession; police however say five who were originally convicted began their attack and then dragged her into woods, leaving trail, where Reyes either joined or followed them; Michael F Armstrong, lawyer and former prosecutor who served on special panel that re-examined case, is not persuaded of single attacker theory; photos (L)