Game dating killer
In 1977, after Alcala's second release, his Los Angeles parole officer took the unusual step of permitting a repeat offender—and known flight risk—to travel to New York City.
NYPD cold-case investigators now believe that a week after arriving in Manhattan, Alcala killed Ellen Jane Hover, 23, daughter of the owner of the popular Hollywood nightclub Ciro's and goddaughter of Dean Martin and Sammy Davis Jr.
Dr Bateson said this trend differed from other research in Australia which suggested that in general sexually experienced people tended to have a higher rate of practising safe sex.
She said this may simply be men re-entering the dating world "with gusto", but without the safe sex education most younger people get given."Just not having that knowledge to be able to understand the importance of using condoms both to protect themselves and their partners," she said."And having those negative perceptions about condoms.
But older women were also less likely to refuse sex without a condom.In June 1971, Cornelia Michel Crilley, a 23-year-old Trans World Airlines flight attendant, was found raped and strangled in her Manhattan apartment.Her murder went unsolved until it was connected to Alcala in 2011."We need to take away any stigma they that may have.There have been some negative perceptions around them, we want to be able to ensure that they are positive when it comes to sexual pleasure."The survey also found that older men with a high number if sexual partners were more likely to be riskier when it came to having safe sex."So they were more likely to have sex without a condom," Dr Bateson said.