A Detroit man charged for a stabbing attack of two EMTs was also charged with the murder and rape of a woman in 2006.
Investigators have already connected him to another rape and now they are combing through other cold cases, believing there are more victims out there.
He was arrested by the DPD's Violent Crimes Task Force for attacking two Detroit first responders early Tuesday morning with a box cutter.
Michael Montgomery looked down and at times appeared confused at his arraignment Wednesday. Police say Montgomery, 30, is all apologies after being taken away in handcuffs Tuesday night.
"I'm sorry, we always hear that," said Steve Dolunt, assistant police chief. "You didn't mean it, really. You weren't thinking about that then. You almost killed two EMTs."
Detroit police say as the EMTs were responding to a call, Montgomery slashed Kelly Adams in the face with a box cutter along with her partner, Alfredo Rojas. Rojas was stabbed in his right hand and slashed just below his right eye.
"The EMTS drove themselves to the hospital," Dolunt said. "Very courageous on their part. As I understand it, they almost bled out."
Originally listed in serious condition, Adams is being released Wednesday. And Rojas, on his way home from the hospital, tells FOX 2 that he is "feeling okay" and is getting some rest, thanking police for catching his accused attacker so quickly.
"You attack someone with a knife, you basically in my mind, a coward," Dolunt said. "You are trying to disfigure someone and they have to live with that the rest of their lives."
Detroit police say Montgomery's violent history goes back roughly a decade. His DNA linked him to two cold cases including the violent sexual assault and murder of 16-year-old Dantoya White back in January of 2006. Police say he raped and stabbed the teen as she was leaving the Edison Public Library when he pulled her into a nearby alley.
"I feel like he's very calculated and very dangerous," said Sgt. Marvin Jones.
And in an alley behind that same library, police say just a month earlier in December of 2005, Montgomery kidnapped, sexually assaulted and tortured a 33-year-old woman.
"And now it's all going to bring it back to the surface," Dolunt said. "And they have to relive it again. I'm not condemning anyone but too little, too late for me."
Calling Montgomery an animal and a predator, police say his DNA was quickly processed last week for another assault - linking him to a fourth assault investigation from January. Now, police wonder how many other victims were previously too afraid to come forward and may still be out there.
Detroit police say charges are expected Thursday in the assault of those two first responders. Meanwhile, Montgomery is being held without bond and facing life in prison.