The man suspected of murdering Linzi Ashton was already wanted by police on suspicious of raping her, Greater Manchester Police said.
Ashton accused Michael Cope of rape in April and Superintendent Kevin Mulligan said police had been seeking to arrest him since then.
Mother-of-two Ashton, 25, was found dead at her Salford home on Saturday.
More top news
Ever wondered what the most expensive seaside town in Britain is? Find out here.
Provost of Eton College threatens to quit the Tory party over suggestions job applicants should be quizzed about private education.
A dry night ahead, with any showers fading away.