I think it means the knife was clipped to the lip of his pocket, which means the handle of the blade of his knife was inside the pocket.
It sounds like that, yes, the police may have made an improper arrest if the charge was the knife.
My question is does making an improper arrest equate to the 2nd degree murder of the person arrested if that person then died in custody?
How exactly did these police kill him? Did they have intent to kill him? Did he injure himself in the van, or did someone else injure him in the van, or was he injured prior to being put in the van?
I am going to need answers to those questions from her.