I just finished watching a really good mystery film with a touch of the paranormal. The film is titled Ghost of New Orleans.
Ghost of New Orleans (2011)

In post-Katrina New Orleans, a disgraced detective encounters the ghost of a murdered woman who wants to help him identify her killer.
He is assigned to observe the guy who lives across the street from the murdered woman's house because the guy is suspected to be a serial killer who strangles women and leaves them wearing Mardi Gras masks.
I highly recommend this film. You can find it on Tubi TV, Pluto TV, and Fawesome.