“507 (1.) Any person brought before any court of summary jurisdiction charged with having in his possession anything which there is reasonable ground to believe or suspect has been stolen and ( sic. ) who does not account to the satisfaction of the court for his possession of the same shall be liable to a penalty not exceeding five pounds or in the discretion of the court to imprisonment for any term not exceeding two months with or without hard labour. (2.) If any person so brought before any court shall declare that he received such thing from some other person or that he was employed as a carrier agent or servant to convey the same for some other person such court shall cause such other person and also if necessary every former or pretended purchaser or other person through whose possession the same shall have passed to be brought before a court and examined …. (5.) For the purposes of this section …. the expression ‘stolen’ means stolen or unlawfully acquired or detained. 513. It shall be lawful for any police constable and all such persons as he shall call to his assistance to arrest and detain without warrant (1.) any person whose name and residence shall be unknown to such constable and cannot then be ascertained by him and who shall commit any offence against ( a ) the provisions of …. this part of this Act.”
“Of course, if when the police had arrested Mr. Leachinsky, all they had believed was that Mr. Leachinsky was in unlawful possession under the Act of this bale — if that was their state of mind at the time of the arrest they could not justify the detention — a wrongful arrest — thereafter by setting up the fact, if fact it had been that Mr. Leachinsky had committed some other felony of which they were wholly unaware at the time of making the arrest. The law, it seems to me, on that point is quite plain. But if they believed he had committed a felony when they arrested him, if there were reasonable grounds for that belief, and they arrested him because they so believed, that act, which was legal and justifiable at that time, does not become illegal thereafter because for convenience a charge of unlawful possession is brought in Liverpool, in order that the real charge of larceny may be prosecuted by the police before the court in Leicester, which was really concerned in the matter. The test as I understand it is what was the state of mind of the police at the time of the arrest. Why did they arrest him? If they arrested him because they believed he had committed a felony and there were reasonable grounds for so believing, they do not lose the protection of the law. And what was not a wrongful act at the time does not become an actionable wrong because thereafter the proceedings in Liverpool are confined to what was really a mere formality, unlawful possession, and the prosecution for felony is relegated to the appropriate court.”
“The liberty of a man is a thing specially favoured by the common law.”
“It is argued that it is unfair not to let the person arrested know what the charge against him is, and no doubt it is desirable that he should be informed as soon as possible of the facts which are said to constitute a crime on his part, and ultimately when the indictment is framed, what the actual charge is. But the undoubted fact that the charge may be altered seems to me to show that the right to know the charge only comes into existence when the indictment is finally drawn.”
“that if a peace officer of his own head takes a person into custody on suspicion, he must prove that there was such a crime committed; but that if he receives a person into custody, on a charge preferred by another of felony or a breach of the peace, then he is to be considered as a mere conduit, and if no felony or breach of the peace was committed, the person who preferred the charge alone is answerable.”
“Q. When a man is arrested, immediately on arrest he is told what he is arrested for, is he not? — A. By me; I always tell him what he is arrested for. Q. The law is, even if you be a police officer of the highest rank, you cannot detain a man without telling him why he is detained, can you? — A. He should be told why he is detained. Q. At once? — A. Yes. Q. Meaning by ‘at once’ the earliest reasonable moment? — A. The earliest reasonable moment.”