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
1990-08-15
1975-03-09
1974-04-01
1974-03-21
1971-09-05
1971-09-06
1983-01-08
1973-05-04
1961-01-01
1982-08-19
1970-09-29
1983-08-08
1984-08-27
1987-06-12
1979-04-30
1982-01-01
1983-07-29
1973-03-24
1974-05-22
1975-05-03