Parallel Construction is a term: https://en.wikipedia.org/wiki/Parallel_construction

Parallel *Re*construction is a play on words I wrote related to a lot of the nuance at play I wasn’t able to cover in the blog without making it very long.

Indeed. Parallel construction is when law enforcement doesn't want to burn their source or their source is unlawful, so they find another way to justify a warrant or prosecution even tho their initial justification comes from a different source.

This has been upheld as lawful, but also can unfortunately be used to disguise unlawful behavior.

Reverse engineering is not related to parallel construction.