“Running isn’t illegal.”
Supreme Court has ruled that in high crime area, fleeing from police is “reasonable suspicion” to apprehend, detain, and search”.
The knife is key though for any further (arresting action). The States’ Attorney is cute by half here, stating in her charging document that the knife is not a switchblade, and is legal in Maryland.
It was a spring assisted knife, which in the city of Baltimore is illegal. I see no case for the illegal arrest and false imprisonment charges.
The Supreme Court has watered down probable cause, and the Fourth Amendment in general, in numerous Unconstitutional ways.
So appealing to that authority doesn't really convince me that the policy is valid, just because it might be rationalized into supposed legitimacy by a Statist court.