What was Mr. Utterson's reaction to hearing about the crime and seeing the weapon?

Mr. Utterson is awoken
early on the morning following the murder, before he is even out of bed, by the police, who have
brought a letter found on Sir Danvers Carew's body, which bears Utterson's name and address. He
goes immediately to the police station because he wants to see the body of the dead man before
making any statements. Utterson identifies the body as Carew's, which surprises the police
officer, because of how well-known and respected Carew is in town. The officer shows Utterson
the murder weapon, "the broken [walking] stick" that Utterson had once "presented
many years before to Henry Jekyll." At this point, then,

Mr. Utterson had already quailed at the name of Hyde; but when the stick was laid
before him, he could doubt no longer; broken and battered as it was, he recognized it
[...].

Utterson is, understandably, shocked, but he
quickly leads the police to Hyde's door so they can arrest the malefactor. He does not want to
believe that his friend Dr. Jekyll is at all connected to this murder, but it certainly does not
look good, considering Jekyll's own walking stick is the murder weapon.