From a legal standpoint, he's free.

Literal

Law [possessive-の] viewpoint [from-からすると], he [topic-は] free-[assertion-だ]

からすると is a useful pattern meaning 'judging from, from the standpoint of'. Built from から ('from') + すると ('if one does'), it introduces a basis or perspective for the main claim. Related patterns: からすれば, からいうと, からみると.