Corie Walsh’s Defense Attorney Was Once Part of Casey Anthony’s Legal Team

When Corie A. Walsh appeared in Will County court following her arrest on three counts of first-degree murder in the death of her 2-year-old son, Barrett "Bear" Walsh, she did not appear with a court-appointed public defender.

Court records show that attorneys Andrea D. Lyon and Robert J. Kerr of Lyon & Kerr, PLLC entered appearances as regular counsel for Walsh.

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Lyon's involvement immediately stands out because of her decades-long career defending some of the most serious criminal cases in the country.

She has represented defendants facing murder and death-penalty prosecutions, led a homicide-defense unit in Cook County and was once part of the legal team representing Casey Anthony.

But Lyon's connection to the Anthony case is often oversimplified.

Andrea Lyon and the Casey Anthony Case

Lyon joined Casey Anthony's defense team while Florida prosecutors were seeking the death penalty against Anthony in the death of her 2-year-old daughter, Caylee.

Lyon was brought onto the defense because of her extensive experience handling capital cases.

She later left the defense team before Anthony's 2011 trial.

That distinction is important. Saying Lyon was "part of Casey Anthony's defense team" is accurate. Suggesting that she was one of the attorneys who ultimately tried the case and obtained Anthony's acquittal would not be.

Anthony was ultimately acquitted of murder, aggravated child abuse and aggravated manslaughter in Caylee's death.

Lyon's involvement occurred earlier, during the period when Anthony potentially faced a death sentence.

The "Angel of Death Row"

Long before the Anthony case, Lyon had developed a national reputation in capital defense.

The Chicago Tribune dubbed her the "Angel of Death Row," a nickname that would later become part of the title of her book, Angel of Death Row: My Life as a Death Penalty Defense Lawyer.

Lyon began her legal career with the Cook County Public Defender's Office in Chicago.

She eventually became Chief of the office's Homicide Task Force, supervising a unit of attorneys handling murder cases.

Her professional biography says she has tried more than 130 homicide cases and defended more than 30 potential capital cases.

According to that biography, 19 of those cases proceeded through a death-penalty phase and none of her clients received a death sentence.

She is also recognized as the first woman in the United States to serve as lead counsel in a death-penalty case.

Those figures come from Lyon's professional biography and describe her career as reported by her firm; they should not be interpreted as a claim that every homicide case resulted in an acquittal.

From the Courtroom to the Classroom

Lyon's career has also included decades in legal education.

She has taught law at institutions including DePaul University and later became dean of Valparaiso University Law School.

Her work has focused heavily on criminal law, trial advocacy, wrongful convictions and capital punishment.

In 1990, she founded the Illinois Capital Resource Center, an organization created to assist attorneys representing people facing the death penalty.

Illinois later abolished capital punishment in 2011.

Lyon & Kerr

Lyon now practices with attorney Robert J. Kerr through Lyon & Kerr, PLLC, a Chicago-based criminal-defense firm.

Kerr has practiced criminal defense for approximately two decades and has handled serious felony cases in Illinois state and federal courts.

The two attorneys have also worked together in post-conviction litigation.

Their firm's professional materials describe Lyon and Kerr as having extensive combined trial experience, including more than 150 homicide cases.

Again, that is a combined figure reported by the firm, not a representation that Kerr individually tried 150 murder cases.

Both attorneys entered appearances for Walsh on September 4.

The appearance forms are also noteworthy for what they do not say.

The forms identify Lyon and Kerr as regular counsel. The box for court-appointed counsel is not checked.

That means the filings do not support earlier suggestions that Walsh was being represented by a court-appointed public defender.

The forms themselves do not establish who is paying the attorneys' fees, so it would go beyond the public record to say exactly how the representation is being financed.

The Attorneys Have Already Taken Different Roles in Walsh's Case

Their involvement became much more visible during Walsh's September 8 pretrial detention hearing at the Will County Courthouse.

I attended that hearing in person.

Although Lyon stood beside Walsh during the proceedings, Kerr handled the primary argument opposing the State's request to keep Walsh detained.

Kerr argued extensively about Walsh's mental state and told the court that medical professionals had diagnosed her with brief psychotic disorder following Barrett's death.

He strongly challenged suggestions that Walsh's alleged actions were inspired by the highly publicized Lindsay Clancy case.

Kerr also told the judge that Walsh's case could potentially become one involving a not-guilty-by-reason-of-insanity defense.

That does not mean an insanity defense has already been formally established or that Walsh has been found legally insane.

Those are issues that would require considerably more legal and medical evaluation as the criminal case progresses.

Judge Amy Bertani ultimately granted the State's petition and ordered Walsh to remain detained.

Lyon Took the Lead on the Fight Over Public Statements

Lyon took the lead on a separate issue during the September 8 proceedings: what attorneys involved in the case should be permitted to say publicly.

Prosecutors sought restrictions on statements made outside the courtroom, expressing concern that extensive publicity could affect Walsh's ability to receive a fair trial.

Lyon argued that Illinois attorneys are already governed by Rule 3.6 of the Illinois Rules of Professional Conduct, which limits public statements by attorneys when those statements could seriously threaten the fairness of a proceeding.

Lyon told the court she had declined interview requests and intended to continue declining interviews.

But she argued that a complete prohibition on public statements was unnecessary and that the defense should remain able to make statements permitted under the existing professional rules.

Judge Bertani ultimately directed both sides to abide by Rule 3.6 rather than completely prohibiting attorneys from speaking publicly about the case.

What Lyon Has Said About Walsh

Before the September 8 hearing, Lyon released a brief public statement concerning the case.

She described Barrett's death as a tragedy for the Walsh family and said the defense's position is that Walsh was experiencing a psychotic episode when the incident occurred.

That statement is significant because it provides an early indication of the defense's focus on Walsh's mental condition.

But it is still the defense's position.

A claim that someone experienced psychosis at the time of an alleged crime is not the same thing as a legal finding of insanity, nor does a mental-health diagnosis automatically excuse criminal conduct.

Whether Walsh's mental condition ultimately affects her criminal responsibility will depend on evidence, expert evaluations and the legal issues formally raised as the case develops.

Why Lyon's Involvement Matters

The identity of a defense attorney does not tell us whether a defendant is guilty or innocent.

It does, however, tell us something about the type of legal representation involved in a case.

Walsh is facing three counts of first-degree murder in a prosecution that is already raising complicated questions involving psychiatric evidence, intent, criminal responsibility, pretrial detention and intense media attention.

Lyon has spent decades working in precisely those areas of criminal law.

Her experience with homicide and capital cases, combined with Kerr's criminal-defense background, means Walsh is represented by attorneys accustomed to litigating serious felony cases.

Their involvement does not predict the outcome.

It does mean that as the State builds its prosecution, Walsh's defense is being handled by attorneys with substantial experience challenging murder prosecutions and litigating questions involving a defendant's mental state.

Walsh remains detained at the Will County Adult Detention Facility.

Her next scheduled court appearance is September 24, 2026, at the Will County Courthouse in Joliet.

Corie A. Walsh is presumed innocent unless and until proven guilty.

Maria Yazmin Garcia is an independent digital journalist with Cookie's World. Follow her reporting on TikTok @CookieYazmin.