After you return from the bayou and get arrested for running, talk to Detective Dan Mann until you have 100 relationship points with him. He will tell you that someone dug a tunnel and escaped from jail. Go back into the jail and notice that the poster that was there is now a tunnel. Between 6 a.m. to 7:30 a.m., a ninja will be in the tunnel and sell you smoothies that will give you skill points. One will give you 2,000 Simoleons.