What does murase say Japanese shutter? ( if you speak japanese and seen shutter.. help)?

Question:

watched shutter and the conversation between jane, ben and the murase was not subtitled. Ben was suppose to translate, but because he was hiding some stuff from jane, ( his involvement with the dead girl) he didn't translate it all before he ran out of there. What did the murase say, the paRT BEN REFUSED TO TRANSLATE.

Answer:

I'm a native Japanese.
Though I haven't seen the film, I sought the potential scene.
If from 00:36 to 00:48 in the below,
http://www.imdb.com/video/screenplay/vi1…

Mr. Murase's dialogue

-Watashi wa...
-Anatatachi no tame ni
-nani mo dekinai.

-Naze kanojo wo suteta?
-Doshite misuteru koto ga deki（ta？

I think his last pronunciation disappeared. Did he choked his voice because of sadness for the dead girl, or anger to Jane and Ben?

-I...
-can do nothing for you.

-Why did you abandon her?
-Why could you leave her to her fate