MILWAUKEE, Wis. (WTAQ) - A Milwaukee man accused of killing 7 female prostitutes over a 21 year period is having his trial moved back. Circuit Judge Rebecca Dallet agreed to a 5 month delay Friday for 49-year-old Walter Ellis. He just changed attorneys. And his new lawyer, Alejandro Lockwood, said it’s the biggest case he’s ever handled.

He’s currently reviewing a big stack of legal documents and evidence, and he wants to make sure there’s not a conflict of interest with any of his previous cases. As a result, a trial that was supposed to start May 3rd will now begin on October 4th. Ellis has pleaded not guilty to 7 murder and homicide charges. The slayings took place in the same Milwaukee neighborhood between 1986 and 2007.