Wait for lunch to be served and sneak a plastic knife back to your cell. Then, while your cellmate is inattentive, do this.

As this is a small jail, the guy next to you informs he is there for car jacking.

Cry out to Reese.

You cry out Reese's name with longing, but nothing happens. In order to summon her, you will have to cast a circle. "Missing your broad already? You've only been in for a few hours. Prison life will pull you apart," your cellmate says.

Request that your anal cavity remain not penetrated.

I know it's cliche, but cut yourself with the most sterile thing you can found and make a circle with your blood.

There isn't anything in the cell that is sterile. You painfully and slow scrape at your wrist until a pool of blood forms on your wrist. Drip by drip you make a circle and draw the same rune that will summon Reese. After waiting several minutes she appears before you in a misty vision. "What the hell are you doing here?" She asks, looking around your cell. Your cellmate looks around disturbed. "You really screwed up this time. The campus knows you're here, but why is a mystery. ...but anyways, what do you need?"

Tell her we need to eliminate our cellmate first of all. He knows too much.

Recruit the cellmate into our party. He's our tank/decoy.

I guess they didn't have any plastic knives at lunch?

you haven't gone to lunch, you've only been imprisoned for a few hours. Also that's pretty dumb, I'm pretty sure someone would check you since you're a possible murderer and didn't cooperate before. Pan isn't very good at keeping a low profile.

You ask Reese to kill your cellmate. In a blink, the cellmate is gone. "Anything else, or did you just want some privacy?" She asks.

Ask her to erase Pan from everyone's memory (except Pan's and Reese's) that was involved with the events following killing the plant. Or time travel back to just before killing the girl to prevent yourself from killing the girl. Also, ask Reese another clue about her trinket.

You beg Reese for help. She rolls her eys at you as you prostrate yourself before her, bawling. You just want to forget everything that happened; unrevocable regret washes over you, your sorrow a never ending pool of depression.

The world fades around you; only Reese and you are in a black void. You feel shaking, like an earth quake. When the world returns you find yourself back in your apartment, asleep on the couch. It would appear that the incidents of the days before never happened.

You look at your cell phone; it states that it is Monday morning. You have been given a second chance.

Do it all over again.
^Wahahahaha!

Is this the same day as when you went investigating and found the potted plant, or the day before?

Conisder it the next day; you were asleep for the previous days - you didn't visit the greenhouse.

Raid the pantry for cookies. If there aren't any, go downtown and buy some then come home.

Make a summoning circle. Then, make a trapping circle. Summon Reese and trap her ghostly essence in the 2nd circle. (Mind you, these circles should be concentric).

Offer Reese a cookie.

A big cookie too, to show how much you care.

You grab a bag of cookies. Setting a large one aside you walk back out to your living room. There is still a summoning circle from before; all you have to do is relight the candles and undergo the humiliating ritual to summon Reese. You grab more cookies and stuff them into your mouth. You set the bag down nearby and cast a binding circle inside the summoning circle. Calling upon the guidance of those beyond the dead and the gods of the universe, the center circle writhes uncontrollably with motion. With enough time the vision of Reese appears, but she is asleep. The binding circle pulls her into itself. In order to complete the circle you will need to bind Reese to something. Standing up or leaving at this point will disrupt the ritual, which will most likely end in a catastrophic explosion that will kill you and any other tenants of the building.

Within grabbing distance is the bag of cookies, a sock, a rug, and a tshirt. In your pockets are your wallet, cellphone and keys.

Remember, once she's bound you cannot use the object she is bound to in any way beyond binding her. Using the item in it's intended manner will cause Reese to be released.

LETS KEEP HER IN THE RUG!!!! Then offer her the cookies.