Problem in Paradise Take 2

Alright, so I found some things out the other day. I went to school the other day and A got a letter in her locker and she showed me it. It said, "You've been warned! I can do so much more - Z" Z with a line through it. Though the cursive was horrid as it looked like, "Youie leen warezed! L can do so much woye - Z" Good thing my translating skills are top notch. I kept it for reference. Later I went to my locker to pack up to get home and I saw a letter stuffed in it that said, "L, This isn't just some easy-peasy mystery! And you leave (PERSON B) Alone! - Z P.S. What part of Bitch back off do you not get" Z With a line through it of course. So I run out to try and catch Person A to show her, whacking a few boys with my back-pack in the process but she was in a hurry and was only able to spare a few glances at it before telling me to take a pic and text it to her. I agreed and scrambled off to the front of my school as I'm in second load so I had to wait extra long for my bus to get here. So to me Person Z kinda just confirmed she knew Person B and that confirmed who Person Z was. A girl from seventh grade. When I approached the front of the school I got there and immediately went to one of my friend's, which then allicted two more girls to join our small huddle as I pulled out the note I got. Seconds later at least (And this isn't exaggeration) eight people were huddled around me trying to figure it out with me. Then one girl pointed out that the Z with a line through it kinda looked like a fancy sideways 'A'. Which was the first letter of the girl whom I think is writing the letter in sevenh grade. All the girls around me were some friend's of mine from seventh grade (Im in sixth remember) and they all told me that this definitely sounded like Z, though she normally wouldn't use bad words. I asked around a bit and they told me that she's also on second load for the other bus, I told them to show me where she is and five girls started leading me towards her. They asked around a bit with some others girls before coming back to me saying that she was there earlier but she kinda just disappeared and they have no idea where she is at the moment. I only gave them a puzzled look before I said alright. I asked them if they knew what her locker number is, and they just looked to each other and started whispering with other girls who I didn't know before one girl tells me that they know the general area but not the exact number, after a few moments she spoke again and told me but she can find out the locker number. I gave her my thanks before going back to talk with some other friend's over the matter. I got more evidence that it was most likely Person Z. My friend told me she knew a girl whose friend's with Z and that she'll sit with her on the bus to try to get information for me. I agreed and gave her my gratitude. After we got off the bus at our bus stop my friend came up to me and said that it's probably Z and that Z DOES know B and that they're good friend's (B and Z). I said thanks and she told me she'll approach Z the next day and pretend she doesn't like me either so she can get some information, and I said thanks (Again) and we parted ways.