Milwaukee Police Chief Edward Flynn speaks at a news conference in Milwaukee on Monday regarding Friday's triple homicide on Milwaukee 's south side. The bodies of Rachel Thompson, 23, and her sons, Torian Thompson-Carter, 4, and Jaden Thompson-Carter, 3, were found murdered in a burning duplex, and Brittney Robertson was murdered across town. Flynn said five people have been arrested over the last two days in connection with the case.

MILWAUKEE - Police on Tuesday were still trying to sort out a case involving five suspects and their possible involvement in the homicides of two women, two children and a fire to cover up some of the deaths.

Milwaukee Police Chief Ed Flynn said Monday that five people had been arrested in the slayings of 23-year-old Rachel Thompson and her sons — 4-year-old Torian Thompson-Carter and 3-year-old Jaden Thompson-Carter. Their bodies were discovered after an arson fire early Friday at their Milwaukee duplex.

Another woman who lived at the home — 19-year-old Brittney Robertson — was found shot to death at a different residence hours after the fire, and police said she also may have been involved in the family's deaths. Police have not said how the Thompson family died or given a motive.

Thompson's 6-week-old son, Maurice Visor Jr., was taken but found unharmed outside a church.

Milwaukee County District Attorney John Chisholm said Tuesday he suspects police will turn the case over to his office later this week, but he didn't know whether charges would be filed that soon.

The children's grandmother, Tondalia Massey, 37, said her son, Freddie Carter, the father of the boys, broke down when she told him about the deaths. He and Thompson had been together for seven years before he went to prison three years ago for recklessly endangering safety, Massey said.

She said she didn't know Robertson and that she last saw Thompson about a month ago. She also said she didn't know why anyone would kill Thompson and the boys.

"We are all left in the dark," she said. "We'd like to know."

Thompson and the boys are scheduled to be buried on Saturday, she said. Visitation is scheduled for Friday.

In 1993, then-6-year-old Rachel Thompson witnessed her mother's boyfriend fatally stab her mother and grandmother and had to testify at his trial. The boyfriend, Freddy Williams, was sentenced to a life prison term, with no parole eligibility for 80 years. Williams died in 1996, while serving his sentence, according to state Department of Corrections spokeswoman Melissa Roberts.