I have a few ideas for you if you want. Maybe that drunken person that gave her his number could have seen Kerri put it in the bin and jump on her when she's walking home. Or maybe Derrick could be kiddnapped or something. i dunno. i had loads before. oh wells good story!
Author's response
Thanks!
I have thought about the Derrick one quite a bit. But the part about the drunken man sounds like an excellent idea :)