A suspected serial killer was charged in the killings of five more women in Milwaukee.

Milwaukee County District Attorney John Chisholm said Thursday that he filed the additional charges against Walter E. Ellis, who now faces five counts of first-degree intentional homicide and two counts of first-degree murder — the equivalent charge that was state law when the deaths occurred.

Ellis is suspected in a string of killings from 1986 to 2007. Police said the 49-year-old's DNA was found on the bodies of nine women ages 16 to 41.

Investigators believe eight of the women were prostitutes who were strangled, and one was a runaway whose throat was cut.

His attorney, Alejandro Lockwood, did not immediately return a message seeking comment.