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
2004-01-01
2011-02-20
1967-09-08
1975-01-28
1973-10-03
1975-03-09
1970-02-10
1991-11-08
1957-12-01
1990-07-09
1985-01-01
1972-06-02
1964-05-04
1974-04-01
1983-08-08
1983-07-29
1984-08-27
1987-06-12
2010-03-03
1950-05-10