That's right, Lopu and Olaf are friends with the Chief of Police. Tyson is also freinds with Kuro, as he addresses Kuro formerly, instead of saying "Officer Kuro".
Also now you have another hint about Cane's power. This is the third hint I've left about his powers, the other two can be found in Chapter 6. If you guess correctly, I will not confirm or deny your guess, however.