Watch how quickly this case begins to collapse as the ‘real evidence’ begins to come to the surface.  Activist, and State Attorney, Marilyn Mosby originally said:

[…] Officer Miller and Nero then placed Mr. Gray in a seated position and substantially found a knife clipped to the inside of his pants pocket. The blade of the knife was folded into the handle. The knife was not a switchblade and is lawful under Maryland law. These officers then removed the knife and placed it on the sidewalk. 

[…]  Lt. Rice, Officer Miller and Officer Nero failed to establish probable cause for Mr. Gray’s arrest as no crime had been committed by Mr. Gray. Accordingly Lt. Rice Officer MIller and Office Nero illegally arrested Mr. Gray. (link)

This was the statement she made when announcing the charges to the media.  Essentially, an oral citation of the probable cause Mosby used to file her ‘take-my-word-for-it’ Direct Action charges.   However, it looks like she was, well, stretching the truth again.
From an article last night – and note how the Baltimore Sun buries the lede deep inside their article:

[…]  Meanwhile, a police investigation continues as Baltimore State’s Attorney Marilyn J. Mosby builds her case. The separate investigations have some conflicting findings.
While Mosby said Friday that the officers had made an illegal arrest because a knife Gray was carrying was not a “switchblade,” a violation of state law, the police task force studied the knife and determined it was “spring-assisted,” which does violate a Baltimore code.
The officers remain free on bail.  (link)

Important to note this “task force” is the hand-picked Baltimore City Sheriff’s Office task force previously mentioned.  Mosby is being deconstructed by her own personal investigative unit.

Go figure !