I recently was looking at our History Link site, which I love, and came across the infamous Mahoney murder from the early '20s. It got national attention at the time. It really had it all - bigamy, wife in a trunk, all kinds of crazy stuff. This link gives a pretty good rundown of it.

On April 16, 1921, James E. Mahoney, a paroled convict, drugs his wife Kate, stuffs her in steamer trunk, and smashes her skull with a club. He then pours quicklime over her body. After locking the trunk and securing it with rope, he calls a transfer company to move it to a houseboat on Lake Union. There, the trunk is placed in a skiff and Mahoney rows to middle of the Lake Washington Ship Canal, just east of the University Bridge and throws it overboard. Kate Mahoney’s nieces, suspecting foul play, report to police that she has mysteriously disappeared. After authorities search the ship canal for weeks, the trunk finally bobs to the surface on August 8, 1921, and is recovered by the tugboat Audrey. Mahoney, already in custody for forgery, is charged with his wife’s murder. A King County Jury, after a 10-day trial, convicts Mahoney of first-degree murder on October 1, 1921 and sentences him to death. He is hanged at the Washington State Penitentiary in Walla Walla on December 1, 1922. Kate Mahoney’s murder, which received national media coverage, was pronounced to be one of the most elaborately planned crimes of the decade.
http://www.historylink.org/essays/output.cfm?file_id=7285