I don't think there's much law can do if he took it while you were still 17.
technically the laptop was property of the mother because it was purchased on her credit card. therefore the theft was not from him but his mother, who is well above 17. since there was no "legal" transaction the sale was confidential, so regulith can still claim it was his mother's.
anyway, good luck, if he tries to hurt you just punch him in the face or kick his shin, shins have a nerve that makes you clench up when it's struck.
lol you're pathetic
lol, you're a dumbass.