I mean, what is the
evidence that this was suspicious, rather than being a typical murder/suicide?
All due respect to Dr Bing Liu, but he wasn't exactly a lead COVID-19 researcher. Here's his page at U of Pittsburgh:
http://www.pitt.edu/~liubing/Bing Liu
Research Assistant Professor
Computational & Systems Biology Department
School of Medicine, University of Pittsburgh
About
I received Bachelor and PhD in Computer Science under the supervision of Profs P.S. Thiagarajan and David Hsu from National University of Singapore. Previously, I have been working with Prof Edmund M. Clarke (Turing Award 2007) as a Postdoctoral Fellow in Department of Computer Science, Carnegie Mellon University, and with Prof Ivet Bahar as a Research Associate in the Department of Computational & Systems Biology, School of Medicine, University of Pittsburgh. Currently, I am Research Assistant Professor in the Department of Computational & Systems Biology, School of Medicine, University of Pittsburgh.
Research
My research area centers on computational systems biology. I develop computational modeling, simulation and analysis techniques to study the dynamics of biological systems. As an integral part of my research, I collaborate with a number of biologists and clinicians to study a variety of crucial biological processes related to human immunity and cancer. I also leverage high-performance computing, formal verification, and machine learning techniques to enable the analysis of multi-scale systems. Furthermore, I am applying the techniques I have been developing to analyze cyber-physical systems that are ubiquitous in safety-critical applications. ...
Here is the statement released by his department, which lists the many different projects he was working on besides COVID-19:
5/6/20:
Department Mourns the Passing of Dr. Bing Liu...Bing was a prolific researcher. During his career he co-authored in 30+ publications, including four in 2020, in addition to a book. He played a critical role in the Bahar Lab and was the leader in systems biology research for Ivet and her lab. He single-handedly helped all of us as well as many collaborators including clinicians here and in other institutions, understand and quantitatively model many complex processes, including immune signaling events, apoptotic and ferroptotic cell death, autophagy, redox lipid programming, response to radiation and radiation therapy, systems (poly)pharmacological treatments. ...
Local coverage:
Pittsburgh Post-Gazette, 5/6/20:
Police: Pitt researcher's slaying didn't involve his COVID-19 work...Mr. Gu [the apparent murderer] was chief software architect at Eaton Corp., a power management company based in Ireland with a location in Moon.
Mr. Liu, 37, had worked under Ivet Bahar, the head of Pitt’s computational and system biology department. She said he was well liked and in the process of studying the infection mechanism of COVID-19. ...
If there was any indication that he was on the verge of some dramatic discovery that would blow the lid off secret Chinese whatever, maybe it would be a little suspicious. But in this case we have a guy who does general-purpose computational systems biology, and he has been helping out many different research projects. Look at the publications listed on his page -- he's hardly ever the first author, and when he is, the titles are like
"A Model Checking-based Analysis Framework for Systems Biology Models" and
"Statistical Model Checking based Analysis of Biological Networks" and
"Quantitative Assessment of Cell Fate Decision between Autophagy and Apoptosis". The word
virus doesn't even appear anywhere on his page.
The only smoking gun here was found in the dead hand of Hao Gu, 200 yards from Bing Liu's house.