noise complaints - couple fighting - NEED ADVISE

[Justin Smith]

good afternoon, I appreciate your advise in advance. 

I have a tenant who sent me screenshots of some conversation where he was letting the upstairs tenant know they were being loud and asked to quiet down. The alleged loud tenant had some harsh words for the downstairs tenant. Cops were threatened to be called but they were not. I have no proof since I dont live here. The downstairs tenant has cameras in his unit and said he has some stuff on there. 

- the alleged loud tenant is month to month until 12/31. I just had her sign a new lease adding her boyfriend who she is alleged fighting with that starts 1/1/25 so If there is going to be a major issue id like to handle it ASAP before that lease would start. 

i received the messages at 2am and have not responded to him. 

1. Should i ask the downstairs tenant for the footage to have as proof to have and document for anything in the future? 

2. Should i speak with the alleged loud tenant or send communication out to all as a reminder?

3.  I thought about advising the downstairs tenant to call the police next time, would that be good? 

4. What other advice can be provided here? I want to make sure i am doing things right thing here but also not accusing anyone and making things worse. I do also want to ensure this doesnt happen again and if needed work to evict.