That he wants to see the effect of his actions on others fits a pattern in these types of incidents.
[Ex. Serial masturbators and exhibitionists like to see the disgusted expression on women's faces. Serial arsonists like to see the people flee the building and the fire fighters put it out. Etc.]
Despite you having photos, the police may choose to take no action, or action which is not effective. ...which leaves you in the role of the problem solver.
While taking this to the level of the press may be fun, you might be able to most effectively deal with this very local problem, -um- very locally.
A little research by you could result in you learning his name.
Then, start small, and (if need be) escalate.
For example, You could send him a letter that states "We, the 50 people who have signed this letter, know where you live, and want you to cut it out." On the letter, provide him with the number for lifeline: http://www.nyc.gov/html/doh/html/cis/cis_lifenet.shtml
If the problem continues, you could create flyers about the incident and put them on local telephone poles, and/or meet with your neighbors to brainstorm.
For better or worse, the change on Nostrand is going to make the change on Franklin look minor.