A Town of Tonawanda man was sentenced this week by Chief U.S. District Judge William M. Skretny to a year in prison.

Dennis Henneman, 75, had previously been convicted of possession of child pornography.

Assistant U.S. Attorney Aaron J. Mango said a forensic analysis of the defendant’s computer and external hard drives revealed more than 600 images of child pornography.

Henneman’s sentencing was the result of an FBI investigation.