PHILADELPHIA (AP) — A Montgomery County doctor has been convicted of conspiracy, money laundering and illegal distribution of oxycodone that federal authorities said resulted in the overdose death of a man.

A federal court jury on Tuesday convicted 74-year-old Dr. Norman Werther of Horsham on several hundred counts, including distribution of a controlled substance resulting in death.

Authorities said they believed Werther helped put 700,000 oxycodone tablets on the street from 2009 until his initial arrest in 2011.

They accused him of illegally prescribing at least 180 oxycodone tablets to the overdose victim in the summer of 2010 before the man’s death in Montgomery County.

Defense attorney Mark J. Weinstein said he was disappointed with the verdict and would challenge it in post-trial motions and pursue an appeal.

(© Copyright 2013 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)