(9th Cir.1954) (concluding that expert opinions did not support jury verdict, in part because "[o]pinion evidence is only as good as the facts upon which it is based” and record did not support opinions). Here, for the reasons stated, the record demonstrates that the officers' percep tion of an immediate threat — whether correct or not — was clearly reasonable and therefore that their initial use of deadly force was justified. 9 . The situation Appellants faced here — having to determine in a split-second whether a suspect is using his vehicle as a weapon — is analogous to the scenario of an officer forced to make a split-second decision as to whether to use deadly force against a suspect who he believes has a firearm. See, e.g., McLenagan v. Karnes, 27 F.3d 1002, 1007 (4th Cir. 1994) (<HOLDING>); Slattery v. Rizzo, 939 F.2d 213, 215-17 (4th
holding that use of deadly force was justified when suspect in vehicle repeatedly refused orders to raise his hands and the officer perceived that he was holding something holding officer may search vehicle for weapons if officer has reasonable belief based on articulable facts that officer or another may be in danger holding that an officer may use deadly force when a fleeing suspect threatens the officer with a weapon holding that use of deadly force was justified against a suspect when officer forced to make a splitsecond decision relied on his reasonable belief that another officer had seen a gun in the suspects hands even though the suspects hands were handcuffed in front of him and the defendant officer never saw a weapon holding that suspect was not in custody when officer handcuffed him for officer safety while transporting him to police station