Adam Bailey, 49, was found dead at his property in Tamer Road, Sleaford, on 16 February after officers received reports of a concern for his safety.
"It might be that you don't realise that what you saw or heard is important; we'd ask that you think back, or view mobile phone or dashcam footage, or social media where you may have seen something posted, and get in touch with anything that might be relevant and allow us to decide.
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