Question

He turned his brother-in-law in for seeing him assault a customer.

Accepted Answer

(transitivehttps://en.wiktionary.org/wiki/Appendix:Glossary#transitive, idiomatichttps://en.wiktionary.org/wiki/Appendix:Glossary#idiomatic) to relinquishhttps://en.wiktionary.org/wiki/relinquish; give up; to tell onhttps://en.wiktionary.org/wiki/tell_on someone to the authoritieshttps://en.wiktionary.org/wiki/authorities (especially to turn someone in)

Sentence	He turned his brother-in-law in for seeing him assault a customer.
Definition	( transitive https://en.wiktionary.org/wiki/Appendix:Glossary#transitive , idiomatic https://en.wiktionary.org/wiki/Appendix:Glossary#idiomatic ) to relinquish https://en.wiktionary.org/wiki/relinquish ; give up; to tell on https://en.wiktionary.org/wiki/tell_on someone to the authorities https://en.wiktionary.org/wiki/authorities (especially to turn someone in)

Turned Brother In Law Assault Customer Give Turn