The helicopters film sprayers with special night-view-cameras and give the information about the location of the sprayers to police units on ground - which have to capture the sprayers.
The helicopters have to fly very deep and very close above heavily populated city areas. Most residents are more pissed of about the helicopters than about the sprayers.
Yesterday one innocent motor biker came to death when a police car, hunting a sprayer, crashed into him.
This new police strategy is another, until now unknown, escalation of repression.
links to german news media: http://www.tagesspiegel.de/berlin/index.asp?gotos=http://archiv.tagesspiegel.de/toolbox-neu.php?ran=on&url=http://archiv.tagesspiegel.de/archiv/08.04.2005/1747775.asp#art http://www.handelsblatt.com/pshb/fn/relhbi/sfn/buildhbi/cn/GoArt
!200013,200050,882687/SH/0/depot/0/ http://www.meinberlin.de/sixcms/detail.php?template=detail_polizeiticker&url=archiv/24530/index.html http://www.meinberlin.de/sixcms/detail.php?template=detail_polizeiticker&url=archiv/24514/index.html