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
1973-03-24
1974-05-22
1977-06-02
1977-01-16
1977-03-18
1974-03-21
1971-09-05
1971-09-06
1978-05-08
1975-05-03
1987-06-12
1984-08-27
1979-04-30
1983-08-08
2001-06-29
1982-08-19
1982-01-01
1969-03-03
1967-09-08
1981-03-10