Depending on what was specifically said, the suspect could be charged with attempting to dissuade a witness (you) from providing testimony.

I agree - contact the police.

Also, provide copies of the medical information to the SJPD. They will likely ask for a medical release so they can get copies of the original records themselves. Keep in mind that on the night of the assault they may have been investigating what they believed was a misdemeanor battery (per PC 242). with the injuries you decscribe - and the medical records to back it up - you may be the victim of a felony per PC 243.

Re-contact the police on this one.

- Carl