Who stabbed old man Amos in TURNER AND HOOTCH (1989)?

Turner & Hooch is a 1989 comedy film starring Tom Hanks, Mare Winningham, Craig T. Nelson, and Reginald VelJohnson. It was directed by Roger Spottiswoode. Hanks plays Scott Turner, a fastidious police detective, who acquires Hooch (Beasley the Dog), a large Dogue de Bordeaux, after the murder of Amos Reed, the dog's previous owner. Turner was set to transfer to a better job with the Sacramento Police Department. David Sutton (VelJohnson) was to be his replacement. Turner pleads with his police chief (Nelson) to let him take the case. The energetic dog promptly sets about destroying Turner's house and turning his life upside-down. But, on a positive note is Turner's courtship of the veterinarian, who cared for Hooch. Eventually Turner, with the help of Hooch, uncovers a money smuggling and laundering operation led by his Chief, and Hooch gives his life to save Turner. In the end, Turner becomes Police Chief, and Sutton does indeed take Turner's former position. On the home front, Turner and the vet are married and expecting a child. In addition, the vet's collie has given birth to Hooch's puppies - including one dog that looks exactly like his father.