Detective Ellery Queen has to solve a series of murders where the victims were killed in numerically descending ages, the male victims were strangled with blue cords and the female victims with pink ones.
1971-11-19
1970-09-29
1969-03-03
1974-03-27
1985-06-06
1961-01-01
2002-11-04
1975-03-09
1950-05-10
1983-01-08
1975-05-03
1977-03-18
1977-06-02
1977-01-16
1974-05-22
1973-05-04
1973-03-24
1979-04-30
1982-01-01
1974-03-21
1971-09-05