“The 2016 police encounter involving retired California real estate agent Arthur G. Lange seemed routine, more likely to be on the TV show Cops than one destined for a major Fourth Amendment confrontation in the U.S. Supreme Court.The case involves a police officer who entered Lange’s garage without a warrant and questioned Lange after pursuing his vehicle because he heard erratic horn-blowing and loud music coming from the car.The question in Lange v. California, scheduled for argument Wednesday, is whether police officers who pursue someone suspected of a misdemeanor into a home may conduct a warrantless search or seizure. It is well-established that police in “hot pursuit” of a suspected felon in public may follow that suspect into a residence.The new case addresses whether pursuit of a misdemeanor suspect qualifies categorically as an exigent circumstance allowing an officer to enter a home without a warrant.” 
For the complete story  Mark Walsh has this report online at ABA Journal.

Lange v. California is a link to all the pleadings in the case.