You mentioned previously existing conditions. Maybe R1 and 601 knew each other from before the building. If not, homicidal fits of rage suggest someone with a serious problem controlling his temper.
Do you know what the landlord told me? He said that Shane would have to be fucking incapacitated, and that I should 'get creative.'
Murder seems to be the solution to everything in this place, but it's not. Unless R1 was attacking Shane, there's no justification for it.