
1974 COLD CASE MURDER OF LISA THOMAS IN ROCKLAND
COUNTY, NEW YORK, UNCENSORED
Revised & Updated 12-08-2025
DECEMBER 8, 2025 - UPDATES
ARE CURRENTLY SUSPENDED PENDING RECENT DEVELOPMENTS
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Lisa's
murder was very similar to other murders Cottingham committed in Bergen
County, New Jersey, bordering on Rockland County. Despite the
fact that Lisa's murder had remained unsolved for fifty years now, nothing was done by police in Rockland County
to either verify
or discredit Cottingham's admission by interviewing him
about his admission.
The reasons are
daunting and perplexing but include personal
ambitions, political agendas and decades of
institutional inter-jurisdictional rivalries and conflicts between the
local Clarkstown Police Department investigating the murder since
1974 and
detectives from the Rockland County District Attorney's Office whose
mandate it became to co-investigate the murder and prosecute
it once an accused is indicted and charged.
Continue
to Chapter 1:
"Getting Away With Murder": The Lisa Thomas Case
In
February 2022, serial killer Richard Cottingham admitted in writing to
investigative historian Peter Vronsky to murdering Lisa
Thomas in 1974 in Nanuet, Rockland County, New York.
See:
WPIX Channel 11 News Report.

Jump to Chapter Three for more details.
Go
to Chapter 1: "Getting Away With Murder" The Lisa Thomas Case 1974
Introduction: more background on Lisa Thomas
Case and the Cottingham admission to murdering her.
From December 2020 to August 2022,
a Cottingham
murder victim's daughter, the late Jennifer Weiss, and
investigative forensic historian Dr. Peter Vronsky, assisted
Rockland County, New York District Attorney's Office in the
investigation of Richard Cottingham, a notorious serial killer
suspected in the cold case murders of
Lorraine McGraw in 1970 in South Nyack and Lisa Thomas
in
1974 in Nanuet, NY.
Weiss and Vronsky had direct personal access to Cottingham who had been incarcerated
since May 1980 in the Trenton State Prison in New
Jersey, and they facilitated and successfully negotiated for
multiple agencies in New York and New Jersey,
ten confessions from him in 2021-2024, including his confession to the murder
of Lorraine McGraw in 1970 in Rockland County.
Vronsky
was also given unhindered access to Cottingham case files in some of
the Cottingham cases in New Jersey and New York.
The Lorraine McGraw case had remained cold for fifty-one years,
until Peter Vronsky identified it in January 2021.
With the help
of Lorraine McGraw's grand-daughter,
Vronsky and Weiss facilitated Cottingham's
confession to her murder
in May 2022 to Detective Conor Fitzgerald
from the Rockland County District Attorney's
Office. See
Media Reports.
The information on the Lorraine McGraw murder case
closure was withheld from the public in May
because Cottingham was also in the
midst of confessing to
the murder of Lisa Thomas at the same time and
because the victim's granddaughter wanted time to prepare her
mentally distraught mother (the victim's daughter who was a child at
the time of Lorraine's murder) for the news.
See Sonia Ruiz (McGraw) Interview.
Cottingham had admitted to murdering Lisa in February 2022 in
a phone conversation and a text to Vronsky,
who shared
the information with Detective Conor Fitzgerald
while he was in the
midst of interviewing Cottingham about the McGraw murder.
Cottingham confirmed in an off-the-record (no Miranda Rights
invoked)
interview with Fitzgerald the claim he made in a text to Vronsky
which unambiguously described the murder of Lisa Thomas.
Richard Cottingham had been originally arrested in 1980 and
convicted at trial in five murders in New York and New Jersey and
sentenced to life imprisonment. After a 30-year silence he
admitted to having murdered between 85-100 women and teenage girls
over a 17-year period from 1963 until his sudden arrest in May 1980.
From
2010 to 2024, Cottingham had made an
additional 14 confirmed confessions to unsolved murders from
1967 to 1975: 6 in Bergen County, NJ; 5 Nassau County and 1
(Lorraine McGraw) in Rockland County, and one recently in December
2024 from the mid-1970s, currently undisclosed by the jurisdiction
involved. Weiss and Vronsky assisted in ten of the murders,
and Vronsky reviewed the original case files in all of the
confessions that unfolded in Bergen County, including the ones he
was not directly involved in.
With the case of Lorraine McGraw closed and confirmed in May 2022,
Fitzgerald was working on confirming Cottingham's admission to
having murdered Lisa Thomas in 1974.
But things went terribly wrong when the McGraw cold case closure
was suddenly and
prematurely announced at Detective Fitzgerald's
behest by Rockland County on June
28, 2022, two days after Cottingham was indicted in another case in Nassau County, NY.
Fitzgerald and Rockland County rushed the announcement to take
advantage of the press on Cottingham resulting from the indictment
two days previously and of a "detective of the year award" recently
presented to Fitzgerald. (See Chapter 3)
(The Rockland County case was the 1968 murder of Diane Cusick which Cottingham described to Vronsky in
2021 in a series of recorded phone
calls, giving Vronsky
directions to enter into Google
Maps, turn by turn, from his mother-in-law's house in Queens Village,
to a shopping mall parking lot in adjacent Valley Stream, Nassau
County in Long Island. Vronsky
identified Cusick as the victim Cottingham had been trying to
describe and then discovered and alerted police that perpetrator
DNA is available in the case and had been previously used to clear another suspect
several years earlier. In June 2021, Vronsky
met with and advise Nassau
County PD to test the DNA they had with Cottingham's
on file in CODIS,
the national Combined DNA
Index System databank. Nassau County
PD and their District Attorney's Office did the test and it matched.
Vronsky testifying before a Nassau County Grand Jury in March 2022,
and Cottingham was indicted in June.
When two days after the indictment in Nassau
County, Conor Fitzgerald and the Rockland County DA suddenly decided
to make the Lorraine McGraw case closure public, in the midst of the
on-going Lisa Thomas investigation. Dr. Vronsky
objected to making the McGraw cold case closure public by
Rockland County in the way it was going to be done, because it would
imperil the integrity of the Lisa Thomas
investigation. It
was too early to make the McGraw case public. Fitzgerald's ambition to be
associated with a notorious serial killer,
out-weighed for him
the integrity of the Lisa Thomas investigation.
Furthermore, Lorraine McGraw's granddaughter -
Sonia
Ruiz - also objected to the sudden and premature announcement,
not having the opportunity to notify her mentally distressed mother
- the daughter of the victim - prior to the announcement being made
available on the internet.
Despite Vronsky's protests,
and his own withdrawal of his name from the case closure credits,
the
announcement in the Lorraine McGraw case was posted on June 24
in Rockland County District Attorney's social media.
Making matter worse, although Vronsky did not know it at the time,
the ambitious Fitzgerald
from the DA's Office had "poached" the Lisa
Thomas case from the current jurisdiction and its lead investigator,
Clarkstown Police Department Detective Chris Maloney. It was
still their case. It had been since 1974, but Fitzgerald
did not make Maloney privy to the admissions Cottingham was making
and during the investigation misled Vronsky, whom Fitzgerald told he
would keep Maloney "in the loop."
Richard Cottingham admitted to both murders. In February 2022,
Cottingham admitted in writing to the murder of Lisa Thomas
and in May 2022 verbally confirmed the murder of Lorraine McGraw which was
subsequently closed but not announced until June.
In June 2022 Rockland County then announced the case closure of the Lorraine
McGraw murder based on Cottingham's confessions but bungled
terribly his confession to
the Lisa Thomas murder and compounded the bungling with an egregious
failure to follow up on Cottingham's written confessions
to murdering Lisa Thomas from
February 2022.
Peter Vronsky makes no claim to Cottingham's guilt or the
validity of his confession; that is Clarkstown Police Department's
and District Attorney's
duty as the 'fact finders.' They have the case file
information against which they can either verify or discount
Cottingham's confession upon interviewing him.
BUT THEY
NEED TO DO THE INTERVIEW and not dismiss Cottingham out-of-hand
without further investigation, and especially not, on the claim that the murder of Lisa Thomas
"is not
consistent with Richard Cottingham's MO" [modus operandi/method
of operation.] See the Richard Cottingham's
MO case statistics
and the
Cottingham MO Matrix Chart.
That is utterly and completely wrong - the murder of Lisa Thomas is
highly consistent with Richard Cottingham's MO as it is now
determined over 19 confirmed cases.
Moreover, according to the long-time Thomas family's lawyer and
confidant, Mavis Dugan Ronayne in Pearl River,
NY, the Clarkstown PD have falsely claimed that
Cottingham had refused to accept a visit from their detectives
to interview him about Lisa Thomas.
This is not correct and untrue if they made such a claim to
Ms. Ronayne.
Clarkstown PD have made no attempt to
interview Cottingham since 2022. Cottingham has never been
contacted by Clarkstown PD with a request to meet for an interview,
and he is willing to accept a visit from
detectives to discuss with them his February 2022 admission to
murdering Lisa Thomas. (It is an inmate's right to refuse
police interviews.)
Nobody from Rockland County has made such a request to him or shown
up to listen to what he has to say and check it against the
Lisa Thomas case files.
Peter
Vronsky acknowledges that there were plausible suspects
in the Lisa Thomas murder,
in particular the "three boys in the woods" that had been accused from the first days
of the murder in 1974. (See
Chapter 1: "Getting Away With Murder" The Lisa Thomas Case)
One of the three boys had been allegedly accused by Lisa in the
weeks before her murder of burglarizing the Thomas home.
The three boys,
as viable suspects at the time, had undergone polygraph lie
detector tests and their alibis were thoroughly
investigated and confirmed, and the
boys were
cleared as suspects in the weeks following the murder.
The boy who was
accused of leading the other two in the assault and murder of Lisa
Thomas is now deceased, having lived his entire life as a suspect in
Lisa's murder without any evidence forthcoming.
Since the summer of 2022, Peter Vronsky has been lobbying the Clarkstown PD and/or the
Rockland County District Attorney to do their duty and conduct a
prison interview with
Richard Cottingham to ascertain the veracity of
Cottingham's confession or
clear him of any further suspicion in the unsolved murder of Lisa
Thomas. One or the other.