Whether the Fourth Amendment, rather than substantive due process, exclusively governed Lewis's claim arising from the fatal collision during an attempted police stop.
Holding
No. The Fourth Amendment did not govern because neither a search nor a seizure occurred.
Reasoning
Under Graham v. Connor, a claim covered by a specific constitutional provision must be analyzed under that provision rather than under generalized substantive due process. But Graham displaces due process only when the particular claim is actually covered by the Fourth Amendment.
The pursuit itself was not a seizure. Under California v. Hodari D., an attempted seizure effected merely by a show of authority, such as emergency lights and pursuit, is not a completed Fourth Amendment seizure.
Nor did the fatal collision amount to a seizure. Under Brower v. County of Inyo, a seizure requires a governmental termination of freedom of movement through means intentionally applied. Smith sought to stop the motorcycle through pursuit, but the collision that killed Lewis was accidental rather than an intentionally applied means of stopping him. The claim could therefore proceed, if at all, under substantive due process.