Why 49ers dropped tampering charges

Several have periodically asked about the tampering charges San Francisco filed against the Jets over Michael Crabtree.

Those have been dropped.

Why? The charges served their purpose, which was to remove the Jets as a possible destination for Crabtree back when the 49ers and Crabtree's agent could not agree on a deal.

Crabtree signed with the 49ers after the tampering charges made it clear San Francisco wasn't interested in eventually trading him or relinquishing rights to him.