Now the BBC1 soap has released the CCTV footage Ian and Peter watched from the night of her death, and it's highlighted a potential new suspect.
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The clip shows Lucy travelling on a bus to Walford common on the night she was killed and it appears she is travelling with someone she knows.
As Lucy goes to get off of the bus, she turns back like she has recognised someone but doesn't speak to them.
We then see a man wearing a beanie hat follow her off of the bus. While his face is not shown, it's been pointed out that on the 18th April episode Jay Brown was wearing the same hat!
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Viewers will also know that episode was when Lucy was killed. So could Jay be responsible for her murder?
He definitely would have a couple of possible motives. Maybe Abi found out about her dad Max's affair with Lucy and wanted something done about it.
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Also, we know that Jay is hiding feeling's for Peter's girlfriend Lola so maybe it was some cruel, twisted revenge for not being able to have her.
**Watch the clip and let us know you if you think it's Jay. **