WINONA, Minn. – Whoever stole his Harley had come prepared. The owner of the Hog said the thieves didn’t just drive it off but brought a trailer to his house for the job and loaded the 800-pound bike by hand. How did he know this? There were trailer tracks in the dirt. He showed the police. Also, he had had the keys to the 1997 black machine with him all day at work. He valued the bike at $3,000, perhaps $4,000. The theft occurred during the day in the 500 block of East Fifth Street, some time before he returned home from work about 5:30 p.m.