i know 逃す is like let someone escape (but you tried to prevent it), and 逃がす is
let someone escape (but you didn't try to prevent it)

How about the causative form of 逃げる, which is 逃げさせる？
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2014-03-30T09:00:36.600
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2015-10-20T23:37:14.313
2015-10-20T23:37:14.313
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question
word-choice verbs
逃げさせる vs 逃す or 逃がす
I would definitely need to add the furigana.

[逃]{のが}す: Unintentional - "to fail to catch". You tried to catch something but
did not succeed. "Not catching" was not intentional though that was the
result.

[逃]{に}がす: Intentional - "to set one free". You meant to let him go.

[逃]{に}げさせる: Intentional - "to let or allow one to escape" You meant to do so.
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2014-03-30T09:37:48.570
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2014-03-30T11:38:13.470
2014-03-30T11:38:13.470
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answer