A 41-year-old Janesville man is accused of getting an early start Saturday. Police say they arrested Shane M. Garthwaite for Operating While Intoxicated about 1:15 in the afternoon. Officer say Garthwaite at first refused the field sobriety test, but when he submitted to the breath test it revealed a .2 blood alcohol concentration. Garthwaite was picked up at the intersection of Beloit Avenue and Palmer Drive. Authorities say this was his 4th OWI arrest.