Perhaps the police had tunnel vision, fixated from the beginning on the belief that the killers were drug dealers.
And the faster our hurrying, the more acute our tunnel vision becomes.
“The security measures create a tunnel vision,” says Benedetto, which Wanderlust hopes to disrupt.
tunnel vision n.
Vision in which the visual field is severely constricted.
To bring something, esp a car motor, to its best state of effectiveness; tinker with to improve: tuning up for the race at Santa Ana
[1901+; fr the process of tuning a musical instrument, suggested by the fact that the performance of motors can be gauged by their sound]