MARSHALL MISSOURI CONSTRUCTION EXPERT WITNESS
DIRECTORY AND CAPABILITIES

How to Properly Fill Out and Use the Conditional Waiver and Release on Progress Payment Form Used in California Construction

December 15, 2025 — William L. Porter - Porter Law Group
This is the first article in a series of four articles discussing how to properly fill out the four California construction releases described in California Civil Code 8132 – 8138. Let me start by noting that in addition to practicing construction law for more than 35 years, I chaired the committee of California construction attorneys who revised those sections of the California Civil Code dealing with this release form and many other construction forms as part of Senate Bill 189 in 2010. I also wrote the first version of this release form and made it free to the public well before the new law took effect in 2012. With this background, let me note a few things about the Conditional Waiver and Release on Progress Payment form to help you avoid mistakes that might prevent you from achieving the intended effect or the form or releasing claim rights to a greater extent than you intend. At the end of this article is a copy of the form itself which includes numbers coinciding with the instructions I will give below. A live electronically fillable version of the form is available on our firm’s website (www.porterlaw.com) under the “Forms” section. It is free and you can fill it out on your screen before printing it out and signing it. Read the full story...
Reprinted courtesy of William L. Porter, Porter Law Group
Mr. Porter may be contacted at bporter@porterlaw.com

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Why Travelers Fought a Fire Claim for Invisible Smoke Damage

February 23, 2026 — Elaine Silver - Engineering News-Record
Just 40 minutes after midnight on Sept. 27, 2018, the sky lit up over Birmingham, Ala. A fire engulfed an apartment building under construction—the last-to-be completed section of a wood-framed complex called the Metropolitan. It fueled one of the largest recorded blazes in the city’s history. Read the full story...
Reprinted courtesy of Elaine Silver, Engineering News-Record
ENR may be contacted at enr@enr.com

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It’s That Time of Year: Contract Review Time

February 02, 2026 — Garret Murai - California Construction Law Blog
My father used to make me wash the family cars every weekend . . . rain or shine. The nice thing about washing a car in the rain is that you don’t need to dry it. Once, while sudsing up one of the family cars in the rain I spotted a couple of Jehovah Witnesses making house calls along our street. As they approached our house, they looked at me, said something to one another, and decided membership probably wasn’t a good fit for our family. If my dad saw that he probably would have thought that was reason enough to have me wash the family cars in the rain. Obviously, I never mentioned it to him. This is all a rather nostalgic way of reminding myself to get off my duff. The holidays are over. There’s stuff needing doing. Whether you like it or not. Like updating my contracts. You might consider doing the same. A few suggestions: Retention For certain private works construction contracts entered into on or after January 1, 2026, retention is now capped at 5%, mirroring the 5% retention cap on state and local public works construction contracts. The 5% retention cap applies to contracts between owners and direct contractors, between direct contractors and subcontractors, and between subcontractors. So, basically, everyone up and down the construction change. Read the full story...
Reprinted courtesy of Garret Murai, Nomos LLP
Mr. Murai may be contacted at gmurai@nomosllp.com

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Risks of Using an AI Chatbot for Legal Advice: Lessons from United States v. Heppner

April 08, 2026 — Payne & Fears LLP
Imagine that you are an executive (who is not a lawyer) and are concerned about what your company plans to do is legal. You could call your lawyer who might bill you for the call. Or, you can ask your AI chatbot, such as Claude or ChatGPT, about the legal risk. The chatbot will likely compliment you on the incisive question, provide you with highly confident answer (that may or may not be right) and will not bill you on an hourly basis. That is essentially what financial services executive Bradley Heppner did. It did not end well. A federal court recently ruled that Heppner’s chats with the AI tool Claude were not protected by attorney-client privilege or the work-product doctrine. That means that the other side (in this case, the federal government) could get access to his chatbot prompts, uploads and responses, and learn a great deal about, for example, whether Heppner knew what he was doing was illegal. Read the full story...
Reprinted courtesy of Payne & Fears LLP

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Construction Liens and the “Substantial Performance” Doctrine

April 08, 2026 — David Adelstein - Florida Construction Legal Updates
In a recent case dealing with a construction lien, the driving issue was whether the air conditioning contractor “substantially performed” before recording its construction lien against residential property. The importance here pertains to the substantial performance doctrine with respect to construction liens. The Third District Court of Appeal explained, with relevant citations, this doctrine as follows: Under Florida law, a contractor is entitled to a mechanic’s lien if he complies with all provisions of Chapter 713, governing construction liens, and “has substantially performed the contract.” Grant v. Wester, 679 So. 2d 1301, 1307 (Fla. 1st DCA 1996) (quotation omitted); Langley v. Knowles, 958 So. 2d 1149, 1151 (Fla. 5th DCA 2007) (“The substantial performance doctrine recognizes that a contactor who complies with all of the provisions of the contactor’s lien statute is entitled to enforce a lien if he has substantially, but not completely, performed his contractual obligations.”). Substantial performance is performance “so nearly equivalent to what was bargained for that it would be unreasonable to deny the promisee the full contract price subject to the promisor’s right to recover whatever damages may have been occasioned him by the promisee’s failure to render full performance.” Ocean Ridge Dev. Corp. v. Quality Plastering, Inc., 247 So. 2d 72, 75 (Fla. 4th DCA 1971). Read the full story...
Reprinted courtesy of David Adelstein, Kirwin Norris
Mr. Adelstein may be contacted at dma@kirwinnorris.com

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The AI Knows Too Much: When Employees Feed Trade Secrets into Generative AI Tools

April 14, 2026 — Kazim A. Naqvi & John V. Mysliwiec - Sheppard
Every time an employee pastes proprietary source code, a customer list, or a confidential business strategy into ChatGPT, Claude, or Google Gemini, they may be quietly dismantling the legal protections that make those secrets worth protecting. Courts and regulators are only beginning to grapple with this problem, and right now, the burden of preventing it falls squarely on employers. The Legal Stakes Under the federal Defend Trade Secrets Act (“DTSA”) and the Uniform Trade Secrets Act (“UTSA”) as adopted across most states, a trade secret plaintiff must show that the information at issue was subject to reasonable measures to maintain its secrecy. Courts have historically credited measures like confidentiality agreements, physical access controls, and employee training—but those safeguards were designed for a world of thumb drives and disgruntled employees. They were not built for a world where a well-meaning engineer can, in seconds, transmit an entire corpus of proprietary data to a third-party AI platform operating under terms of service that may permit the provider to use inputs for model training. Reprinted courtesy of Kazim A. Naqvi, Sheppard and John V. Mysliwiec, Sheppard Mr. Naqvi may be contacted at knaqvi@sheppard.com Mr. Mysliwiec may be contacted at jmysliwiec@sheppard.com Read the full story...

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Chris Konzelmann Appointed to NASP Board of Directors

November 03, 2025 — White and Williams LLP
White and Williams LLP congratulates Chris Konzelmann, Partner and Chairman of the Subrogation Department, on his appointment to the National Association of Subrogation Professionals’ (NASP) Board of Directors. In an announcement posted to LinkedIn, NASP stated, “These new board members bring diverse experience, leadership, and a shared vision for NASP’s future. Together, they will continue advancing NASP’s mission to provide education, advocacy, and community for subrogation professionals across all industries.” Chris is a long-standing member of NASP and a frequent presenter at its Annual and Spring Conferences. He also regularly delivers webinars and training sessions for subrogation clients, helping them stay informed on legal developments and best practices in recovery strategy. Read the full story...
Reprinted courtesy of White and Williams LLP

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Recognize: A Construction Safety Week Technical Bulletin

February 23, 2026 — Construction Safety Week - Construction Executive
Construction Safety Week has long been a powerful show of force, a catalyst for bringing the industry together and putting a spotlight on the critical importance of safety. It represents a shared commitment across an expansive and impactful Industry. The construction industry is a major employer and significant contributor to the U.S. economy, creating nearly $2.1 trillion worth of structures each year—and with that scale comes immense responsibility— and opportunity. Over the last decade, we’ve made meaningful strides: advancing best practices, transitioning from hard hats to helmets, shedding light on vital issues that affect safety, like mental health, fostering a culture of care and accountability, and creating partnerships and initiatives for improving jobsite safety. Reprinted courtesy of Construction Safety Week, Construction Executive, a publication of Associated Builders and Contractors. All rights reserved. Read the full story...

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