Marmaduke went with his owner-lady to her knitting class, during which she made him a silly and unflattering costume of some sort, made him wear it, and showed the world at large that yes, life DOES begin at 40.

Marmaduke is wearing sunglasses. A police officer remarks upon this accessorization and betrays either a remarkable ignorance of the American justice system (of which he is a crucial part), or a terrible, terrible sense of humor.