Below is a copy and paste from TV Guide.
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Exclusive: Edward James Olmos to Guest on CSI: NY
TV Guide Magazine has learned exclusively that CSI: NY has cast Edward James Olmos in his first television role since Battlestar Galactica's heroic Admiral William Adama.
In a story about gang turf wars, the actor plays a former gang leader - newly released from prison - who goes head-to-head with Mac Taylor (Gary Sinise), who had put him away 15 years earlier. The episode will air in October.
source:
http://www.tvguide.com/News/CSINY-Edward-James-Olmos-1021548.aspx------------------------------------