Police have charged a 31-year-old Hispanic with sexually assaulting four women in knifepoint attacks in Kensington

Marcos Camacho was pulled over by police, hours after police at the Special Victims Unit announced that they were searching for a man matching his description and that of his car. Investigators initially said that they were looking for a suspect in the attacks of three women, but the District Attorney's office said that Camacho also was charged in a fourth assault. Camacho, who authorities said is an illegal alien, was ordered held on $1 million bail at his arraignment. The assaults took place along the Kensington Avenue corridor, the area where police said the so-called "Kensington strangler" Antonio Rodriguez preyed on drug-addicted women in November and December 2010. Rodriguez was arrested in January 2011 and is awaiting trial in the deaths of three women. Police say that he has confessed to the killings. The recent investigation began Nov. 14, 2011 after one woman told police that she was sexually assaulted after she got into a man's car on Kensington Avenue near Somerset Street. On Nov. 22, 2011 two more women told police that they were attacked several hours apart in the same area. Police traced the car to Camacho, who is said to live in Norristown, and brought him in for questioning. Besides three counts of rape, Camacho is charged with aggravated assault, sexual assault, unlawful restraint, possession of an instrument of crime and related offenses, court records show. When police searched for Antonio Rodriguez in 2010, they initially faced a challenge in gathering information. Many who frequent the neighborhood are involved in drugs or prostitution, said Philadelphia Capt. John Darby, head of the Special Victims Unit, and can be hesitant to approach police with information. Some victims may not report crimes to police out of fear that they will be arrested, Darby said, and only come forward after learning of the existence of other victims. "We've shown over and over again that we're ready, willing and able to investigate every single one of these cases," Darby said. "What we're trying to do is get a violent offender off the street, so every victim is important."