Suspects who can afford good lawyers require stronger evidence for prosecution.
For Jiang Yuan to explain his footprint analysis in a Malaysian court will require a significant effort. It's akin to explaining DNA in the previous century; you must first make non-specialist judges and jurors understand what DNA is, its accuracy, how it's obtained, how to prove it's fake...
If Jiang Yuan intends to develop in Malaysia in the long term and promote footprint analysis, this case presents an excellent opportunity. To use suspects identified through footprint analysis and corroborate it with other established technologies is a form of proof in itself.
However, Jiang Yuan has no such intention.
Promoting footprint analysis domestically is already challenging, let alone in Malaysia. If he were to pursue this, it might take him the next ten years. He might also need to train a batch of Criminal Science talents skilled in footprint analysis.
