Louise, from Havant, was last seen alive at midday on VE Day, May 8, in Somborne Drive, Leigh Park. Last Thursday morning, officers searching for her found a body in Havant Thicket, near Rowlands Castle on the West Sussex border.
Two people, initially arrested on suspicion of kidnap on May 14 and released on bail, have now been re-arrested.
A police spokesperson said: “The 29-year-old man has been arrested on suspicion of murder, and the 29-year-old woman arrested on suspicion of assisting an offender.
“They remain in custody at this time.”
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