Coldcase Evidence?

One night my good friend John woke to the gut wrenching cries of Mr. Frodo, one of his cats, laying in a back alley of his apartment building after apparently falling out of the second story window. Until now it was believed to be either a) a horrible accident, or b) a suicide attempt.

Yes, we all know Mr. Frodo has a drinking problem:
And is known to beat on his live in girlfriend from time to time:
As a direct effect from the partying and long time alcohol abuse it could be determined that Mr. Frodo could have fallen out of that window after drinking heavily and he had a dispute with his girlfriend hours before. This was the accepted situation of events until I was digging through old photos and found this little gem:
This photo was taken 2 nights before the accident, and it is no secret that Joe dose not like Johns cats. From this photo it looks like Joe is sizing up the window, the window sill, and the back alley, and right in front of Mr. Frodo's father.
Joe?