• Police in Miami, Florida, have arrested 60-year-old Robert Koehler, who they believe raped 44 women in the 1980s.
• Police only found Koehler after his son was arrested on an unrelated case and his DNA matched a sample held by police as evidence connected to a 1983 rape case.
• Koehler was arrested after police analyzed his DNA by following him to a public place and swabbing things he had touched.
Police in Florida have arrested a 60-year-old man they believe to be a criminal dubbed the "Pillowcase Rapist," who's accused of raping at least 44 women in the early 1980s.
Police in Miami, Florida, were led to Robert Koehler after his son was arrested on an unrelated, undisclosed charge, and his DNA was found to match a DNA sample that had been held by investigators for 37 years as evidence in a 1983 rape case, according to the Miami Herald.
Koehler, a 60-year-old who lives Palm Bay, was arrested last weekend and has been charged with two felony counts of sexual battery.
While he's only been charged in two cases, police believe he raped more than 40 women in South Florida between 1981 and 1986
The nickname "Pillowcase Rapist" was given after victims said their attacker broke into their homes, shielded his or their faces with a pillowcase, and raped them at knifepoint.
The alleged rapist went undetected for years while police posted flyers across Florida and questioned hundreds of suspects.
After the DNA sample that had been held for decades was connected to Koehler, police followed him to a public area and obtained DNA swabs from things he had touched, according to an affidavit seen by CNN. The affidavit said samples led to a probable cause for his arrest.
Police still have to collect DNA directly from Koehler's body and confirm it matches the evidence from 1983.
Koehler made an appearance in court on Tuesday, where he told a judge he was not guilty.