Jon Cryer's Ex-Wife -- Mum on Murder Plot

1/22/2010 7:00 PM PST BY TMZ STAFF
Jon Cryer's ex-wife Sarah Trigger was questioned by photogs -- and the FBI -- about the alleged murder for hire plot against her ex-husband ... but if she had anything to do with it, she certainly wasn't talking.

Sarah Trigger: Click to watch

Trigger told us last week she knew nothing about the alleged plot. The FBI is investigating.