I’ve mentioned the “fruit of the poison tree” before which is used in law enforcement terms as, well, tainted evidence. In other words, if an officer performs an illegal search and finds a ton of narcotics the case will likely be thrown out.
Even though the officer found the narcotics, the search was done illegally so therefore the evidence is not admissible in court to convict the suspect. Of course, we’ve seen that the NFL isn’t playing by these rules unfortunately.
If Vilma can secure Cerullo to testify that he manufactured the bounty ledgers and did in fact try to retract his testimony to the NFL, it could be the death nail for the investigation.
Much like the “fruit of the poison tree”, even if there is other evidence , it would show that the entire investigation could be tainted and lacking integrity.
In other words, the next bit of evidence would be under scrutiny and then the next. The case would then fall apart like a shoddy house of cards.