A California serial killer, who murdered two family members and then five random strangers, told authorities he killed his pedophile cellmate because he was a slob, according to local reports and court documents obtained by Fox News Digital.

Ramon Escobar, 52, was charged with killing cellmate Juan Villanueva, 53, in September, months after prison guards found the convicted child rapist dead in his cell.

When an officer arrived to check on Villanueva, Escobar allegedly, without being questioned, confessed out of the blue.