Any law-enforcement officer or Department officer or employee who is in uniform or exhibits a badge or other sign of authority shall have the right to inspect any motor vehicle, trailer, or semitrailer in any public garage or repair shop for the purpose of locating stolen motor vehicles, trailers, and semitrailers and for investigating the title and registration of motor vehicles, trailers, and semitrailers. For this purpose the owner of any garage or repair shop shall permit any law-enforcement officer or Department officer or employee freely to make investigation as authorized in this section.