What does 判断裁量 mean here?


I have another sentence I'm grappling with *[see footnote for context]:

> キラかどうかの判断{はんだん}裁量{さいりょう}にはなりえない

I'm pretty sure from my dictionaries that 判断 means "judgement" but cannot
figure out what makes sense for 裁量. All I can find is "admeassure[ment]",
"discretion" or "judgement" again, which would be weird, because the compound
would mean "judgement judgement". None of these options seem to make sense, so
some interpretation help would be appreciated.

I understand the rest of the grammar. Whatever this word compound is "cannot
become", which in English would mean "cannot be [in the future]". Thus it's
crucial to understand this compound.

The translation reads "I won't be able to use this to figure out whether or
not he's Kira." so the translators seemed to have just ignored one or both
words from the compound.

Note on context:

> The speaker is a detective who is playing tennis with a suspect in the
> "Kira" case in order to try to figure him out. Kira is a notorious serial
> killer.

Dictionaries:

> <http://jisho.org/> [wwwdjic];  
>  <http://ejje.weblio.jp/>




I'm pretty sure that this is a mistake and should read, 「判断 **材料{ざいりょう}** 」.

It would be easy to mistype 材料{ざいりょう} as 裁量{さいりょう}.




I'm pretty sure that this is a mistake and should read, 「判断 **材料{ざいりょう}** 」.

It would be easy to mistype 材料{ざいりょう} as 裁量{さいりょう}.

