Robert Oakley Marshall (December 16, 1939 – February 21, 2015) was an American businessman who in 1984 was charged with (and later convicted of) the contract killing of his wife Maria.

In 2002 Marshall wrote the book Tunnel Vision: Trial & Error, in which he challenged the conclusions McGinniss drew in Blind Faith.

While pointing out flaws in the judicial process he believed failed him, Marshall also alleged that his trial was contaminated by police misconduct and compromised testimony and evidence.

With a March 2015 parole hearing pending, Marshall died in South Woods State Prison in Bridgeton, New Jersey on February 21, 2015.

He claimed that when he and his wife pulled over at the Oyster Creek picnic area in Lacey Township (which was closed at the time), he noticed the right rear tire was flat.

Marshall was involved in a 14-month affair with Sarann Kraushaar, a vice-principal at Pinelands Regional High School in Tuckerton, whom he told he wanted to "get rid of" his wife to use her insurance money to pay off his debt.

While pointing out flaws in the judicial process he believed failed him, Marshall also alleged that his trial was contaminated by police misconduct and compromised testimony and evidence.

[11] On May 12, 2006, Prosecutor Thomas F. Kelaher declined to retry the death-penalty phase of the case, citing as reasons the difficulty in presenting evidence more than 20 years after the crime, and the probability of many more legal appeals should Marshall be sentenced to death again.

[13][14] With his health reportedly failing in the months prior following a "debilitating stroke", Marshall died in South Woods State Prison in Bridgeton, New Jersey on February 21, 2015.