Task: Question Answering
Input (English): Passage: In the Arizona desert, truck driver Martin "Rubber Duck" Penwald is passed by a woman in a Jaguar XK-E, which leads to an encounter with a state trooper. Proceeding on his way, Rubber Duck runs into fellow truck drivers Pig Pen/Love Machine and Spider Mike, when another "trucker" informs them over the C.B. that they are okay to increase their speed. The "trucker" turns out to be Sheriff "Dirty Lyle" Wallace, a long-time nemesis of the Duck, who extorts them for $70 each. 
The truckers head on to Rafael's Glide-In where the Duck's sometime girlfriend, Violet, works as a waitress. Melissa, the driver of the XK-E, is also there; the car broke down and she had to sell it and some of her belongings in an effort to leave Arizona, as she's due in Dallas for a job. The Duck offers Melissa a ride; Violet is unimpressed and ushers him away to give him a special birthday present. While away, Wallace shows up at the Glide-In checking plates. Pig Pen and Spider Mike start making fun of Wallace over the diner's base-station CB radio, leading to Wallace attempting to arrest Spider Mike for "vagrancy".
The Duck, having been warned by Widow Woman, enters and tries to smooth things over. But Lyle is determined and insults Mike, who is desperate to get home to his pregnant wife. Mike punches Wallace, leading to a brawl in the diner when some troopers arrive to assist Wallace. The assorted truckers prevail, and the Duck handcuffs Wallace to a bar stool. After pulling the spark plug wires and distributor caps out of the police cars, they all decide to head for the state line to avoid prosecution. 
Question: What is the nickname of the person who checks plates?
Output (English): Dirty Lyle.