If there was no fiber or other evidence,yes I think so,b/c as far as that note goes,Patsy might as well have just signed it, "Love,Patsy".
But that would also depend on their behavior,as such, it's so obvious they're not really trying to find any killer,and never were.Even bf the note was released,I was,as everyone else was too..baffled as to why they weren't angry.It just didn't fit in with being innocent.
something to ponder:
When the corruptible shall have put on incorruption, and the mortal have put on immortality, then shall we be brought to pass the saying that is written, Death is swallowed up in victory.
O death, where [is] thy sting? O grave, where [is] thy victory?
The sting of death [is] sin; and the strength of sin [is] the law.
But thanks [be] to God, which giveth us the victory through our Lord Jesus Christ.
1 Corinthians 15:54-57