Русско-англо-русский юридический словарь

The burden of proof lies with Crown prosecutor Nadine Piche, who is expected to call a psychiatric expert. (Ottawa Sun)

An expert report is a study written by one or more authorities that states findings and offers opinions.

In law, expert reports are generated by expert witnesses offering their opinions on points of controversy in a legal case, and are typically sponsored by one side or the other in a litigation in order to support that party's claims. The reports state facts, discuss details, explain reasoning, and justify the experts' conclusions and opinions. (Wikipedia)

Legal analysis in the broad sense refers to a statement by a court, judicial officer, or legal expert as to the legality or illegality of an action, condition, or intent. It can be a written document in which an attorney provides his or her understanding of the law as applied to assumed facts. (definitions.uslegal.com)

A working group is an ad hoc group of subject-matter experts working together to achieve specified goals. (Wikipedia)