What is the current state of the law in this case?

The situation here is thus unlike that in Michigan v. Tyler, supra, 436 U.S. 499, 98 S.Ct. 1942, 56 L.Ed.2d 486, where it was held that law enforcement officials could not draw a conclusion of abandonment and act thereon based solely upon evidence of arson acquired from their own investigative efforts conducted On the premises. (436 U.S. at pp. 504-506, 98 S.Ct. at pp. 1947-1948, 56 L.Ed.2d at pp. 495-496.)