Artist: Sketch of Baseline Killer as close as witnesses can recall

But how accurate is that sketch?

Kirt Messick, the forensic artist who drew the face for Phoenix police, said Friday he's been successful in the past with his other drawings. After 70-some sketches in seven years, Messick said he sometimes creates a good likeness of the person who was eventually arrested.

Still, a police sketch is only as good as the witness' memory. Messick said people's memories can fade significantly just days after an attack, and only two people so far have been able to help him put together the composite image.

"You're only putting down what they remember," Messick said at a press briefing at police headquarters. "I'm just recording what they saw."

Messick drew the black-and-white sketch between September and November, forming a composite picture while working with witnesses who said they saw the Baseline Killer.

Police believe he has struck numerous times since then. His latest attack was June 29, when he is thought to have abducted 37-year-old Carmen Miranda from a car wash and killed her.

There have been many new witnesses, but Phoenix police Sgt. Andy Hill said investigators haven't interviewed anybody who was more confident of what he looked like than the first two witnesses.

Police have no suspects in the case.

Hill said police are hoping that someone will eventually call with information that leads to the Baseline Killer.

Even though it's been two months since his last attack, Hill said he believes he remains in Phoenix. In the past, the killer has waited similar lengths of time between attacks, Hill said.

"I would think it's a mistake for people to let their guard down and believe that he's gone," he said.

Informants also helped with the capture of the suspects in the city's other serial killings, Samuel John Dieteman and Dale S. Hausner.

Dieteman, 30, and Hausner, 33, are each charged with murder and attempted murder in connection with 16 shootings since May.