CSI: NY Season 7 Episode 3 (CSI: NY s07e03) with title “Damned If You Do” aired on Friday, October 8th 2010 at 09:00 pm via CBS Network.
Here is summary for CSI: NY Season 7 Episode 3 :

When a married couple is found beaten in their home, a mother identifies her son as the killer and the CSIs believe they have their suspect, but all is not what it seems when another witness comes forward