Mayor Mike Duggan predicted it would take two weeks to check 1,000 properties on Detroit's east side. Other crews then will board up the houses, a job that could last through July, before they're eventually demolished.
Police Chief James Craig believes the women could have been lured into blighted houses, raped and killed. He suspects two worked in the sex trade.
"It appears we may have a serial killer," Craig said.
Craig said investigators were seeking a person of interest in the case: a man in his mid-30s who's known to be homeless and who frequents the east side. Police released two photos of the man in an effort to generate tips from the public, and he was taken into custody Friday night.
Craig did not say why the man was considered a person of interest.
The chief said the third victim was a 55-year-old woman whose name he declined to release because her family had not yet been notified. The other women have been identified as Nancy Harrison, 52, and Trevesene Ellis, 53.
"We have been getting regular leads, tips" about the deaths this week, Craig said. "We're following up on each and every one. ... We're going to find this violent predatory criminal."
Abandoned houses have marred Detroit for years. The city has demolished about 18,000 properties since 2014 and has another 18,000 houses to go, Duggan said.
"Getting these houses down is absolutely critical," the mayor said. SHARE THIS NEWS USING ANY OF THE BUTTON BELOW PLACE YOUR TEXT ADVERT BELOW ⬇⬇⬇