In 1971, he obtained a counseling job at a New Hampshire arts camp for children using a slightly different alias, "John Burger".
He was sentenced to death in California in 2010 for five murders committed in that state between 19.
"My advice is this: wait as long as you can," Allen says.
Her rationale for these dating rules may seem obvious, but many people tend to forget in the heat of the moment.
Prosecutors say that Alcala "toyed" with his victims, strangling them until they lost consciousness, then waiting until they revived, sometimes repeating this process several times before finally killing them.
Police discovered a collection of more than 1,000 photographs taken by Alcala, mostly of women and teenage boys, many in sexually explicit poses. Army in 1960, at age 17, where he served as a clerk.