A 21 year old man is accused of attacking his father with a knife in Paradise. Justin Caddy was taken into custody Saturday around Bille Road. Police say Caddy was an unwelcome guest at his father's home, punched the victim in the face, and allegedly tried to stab his father. Police say the victim suffered serious injuries to his hand while defending himself. Caddy was booked into the county jail for assault with a deadly weapon.