I am wondering if there is a 5th amendment protection against exculpatory evidence being used as the basis of new, different criminal charges?
The following is a parallel hypothetical to a real-life scenario:
An example would be - a guy is charged with shoplifting at a store. The surveillance video shows a person of similar build to Suspect X, an individual who has been in trouble with the law prior. Upon interview with Suspect X, he claims he doesn't know where he was that day/time. Suspect X is arrested, based on prior convictions and the video evidence.
Suspect X posts bond, and calls his local attorney. Attorney reviews Suspect X's social media, and finds a Facebook Live video showing Suspect X chilling on the couch, smoking weed, and with a line of cocaine on the coffee table. The video is timestamped the same time as the shoplifting, with a television playing in the background. The movie playing on the television in the video is what was playing at that time, providing further evidence of the authenticity.
Here's the dilemma. Suspect X has proof that he was not guilty of the shoplifting charge. However, the proof itself does provide evidence of a different crime - possession of a controlled substance.
The original charge is a misdemeanor. The possession charge would be a felony.
Can Suspect X's attorney safely present the exculpatory evidence without placing his client is a greater jeopardy of even harsher charges? Could the DA seek a search warrant, claiming the video creates probable cause? To make clear, this video was posted privately to the suspect's Facebook account. It is unrealistic that it would have come to the prosecution's attention without the defense using it as exculpatory evidence.
If so, what is the cites and precedent for doing so?