[Derek lets out a sigh and runs a hand over his face.]

You're going to need some bloody context to understand...

[Derek takes another sip.]

Remember how I was a wreck back in January because my ex left me? The beginning of the month was exceptionally bad for me... and it just got worse, thus the excessive drinking I was doing when I was over here in January. Because... this all could have been avoided if Matt minded his own damn business. He walk in on me in the back bathroom at the precinct crying my bloody eyes out because it had only been a few days since she had left and I was having a shitty day. He practically cornered me in a bathroom stall, asking me what was wrong, how could he help, should he get Tatsuo. I told him to go away and he wouldn't listen. He just kept pushing me... and I snapped.