It is discovered that Alice was killed by Janet Warner, a client whose family fortune relied on a contract with a diamond distributor. If the man-made diamond's perfection were revealed, her family's business interests would have been ruined .
Nathan Fillion (Richard Castle), Stana Katic (Kate Beckett), Jon Huertas (Javier Esposito), Seamus Dever (Kevin Ryan) . [S6E8] A Murder Is Forever
Detailed recaps and viewer discussions can be found on platforms like the Castle Wiki and TV Fanatic. "Castle" A Murder Is Forever (TV Episode 2013) - IMDb It is discovered that Alice was killed by