HemoSpat News

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FORident Software is pleased to announce the release of HemoSpat v1.9.1 for Mac OS X 10.9-10.10, Windows 7, Windows 8, and Windows 8.1. This update is available to all registered users.

This release addresses a couple of issue discovered during a Math & Physics for Bloodstain Pattern Analysis course at the Ontario Police College earlier this month. Thanks to Irv for reporting the issues and testing the fixes!

The fixes focus on drag & drop of images into a project – due to timing issues, some images could be duplicated – and on zooming of images. The memory requirements for displaying images was reduced and the speed of zooming of images was dramatically improved.

HemoSpat - Impact Pattern

HemoSpat – Impact Pattern

For download links and a more complete list of changes, please see the release notes.

As always we look forward to hearing your feedback and suggestions!

HemoSpat Icon
FORident Software is pleased to announce the release of HemoSpat v1.9 for Mac OS X 10.9-10.10 [64-bit Intel], Windows 7, Windows 8, and Windows 8.1. This update is available to all registered users.

In June 2015 I had the opportunity to teach an Advanced HemoSpat course at the Canadian Police College (CPC). We used HemoSpat version 1.8 and focused on using the new stain selection technique. This allowed me to observe its use to come up with better methods and, along with feedback from the class, used that information to fine tune the process.

HemoSpat version 1.9 introduces these refinements to make the process clearer and more streamlined.

HemoSpat - Point Select Tool

HemoSpat – Point Select Tool

I wrote up an article about the new stain selection workflow which should give a better idea of how it works in practice.

This release also contains many bug fixes and optimizations. For download links and a more complete list of changes, please see the release notes.

As always we look forward to hearing your feedback and suggestions!

HemoSpat version 1.8 introduced the capability to do stain selection within HemoSpat. Using reference images, the user analyzes one stain in the image and the Point Select tool allows the analysis of any other stain in the image very quickly.

This process has several benefits:

  • it speeds up the documentation process dramatically
  • it encourages the use of more stains for an analysis
  • it allows peer review of the stain selection process

In June 2015 I had the opportunity to teach a HemoSpat course at the Canadian Police College (CPC). We used HemoSpat version 1.8 and focused on using the new stain selection technique. It was clear that documenting the scene was a lot faster and that the analysts tended to use more stains in their analysis of the impact patterns. Overall it was a great validation of the process.

This was also a great opportunity for me to see the new feature in action – what worked, what didn’t, and what could be improved. I used this information along with feedback from the class in order to fine tune the process. HemoSpat version 1.9 introduces these refinements to make the process clearer and more streamlined.

HemoSpat Stain Selection - Example Reference Image

HemoSpat Stain Selection – Example Reference Image

In this article I will outline the process of documenting and analyzing stains using the new Point Select tool.

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I had the opportunity to teach a two day HemoSpat course at the Canadian Police College (CPC) this past week. Last year, Sgt. Jennifer Barnes, a HemoSpat user from the Royal Canadian Mounted Police (RCMP), contacted me and asked if I ever put on HemoSpat workshops. This conversation evolved into the creation of a two day class organized by Sgt. Beverly Zaporozan the Forensic Identification Training Coordinator at CPC. She did a fantastic job organizing everything so it all ran smoothly.

We had fourteen students from across Canada and the US. They came from five different organizations: several RCMP National Forensic Identification Support Services sections, the Edmonton Police Service, the Toronto Police Service, the Waterloo Regional Police Service, the Vancouver Police Department, and the US Naval Criminal Investigative Service (NCIS) were all represented.

The course had both classroom and practical components. The lecture part covered scene documentation extensively – both surface and pattern – along with a review of key concepts and sections on how HemoSpat works under the hood, 3D exporters, working with laser scanner point clouds, and some cast-off pattern research.

Over the course of two days, the students documented and analyzed two scenarios – the first consisted of multiple impacts using “regular surfaces”:

CPC HemoSpat Course - Scenario 1

CPC HemoSpat Course – Scenario 1

The second one had multiple angled surfaces – a sloped ceiling and a cabinet in the corner – and multiple impacts:

CPC HemoSpat Course - Scenario 2

CPC HemoSpat Course – Scenario 2

One of the areas we focused on was the use of the new Reference Image and Point Select tool from HemoSpat 1.8. This allows the analyst to photograph groups of stains and do stain selection in HemoSpat.

CPC HemoSpat Course - Reference Image Example

CPC HemoSpat Course – Reference Image Example
Any stains in this image may be used for analysis

This sped up the documentation process dramatically. It was also interesting to note that, as a result of the new technique, the analysts tended to work with more bloodstains than they normally would.

Staff Sgt. Gord Lefebvre of the Ontario Provincial Police (OPP) provided invaluable assistance – creating the patterns, teaching part of the pattern documentation section of the course, and answering questions in the hands-on documentation and analysis parts.

CPC HemoSpat Course - Gord Creating An Impact Pattern

CPC HemoSpat Course – Gord Creating An Impact Pattern

The feedback from the students was overwhelmingly positive so I hope I will have the opportunity to teach the course again and that we can open up the registration to other organizations.

CPC HemoSpat Course - Scenario Analyzed

CPC HemoSpat Course – Scenario Analyzed
Exported in 3D and displayed using Apple Preview

We collected all the data – photographs and location documentation – from the six experiments (three groups, two scenarios each). If any HemoSpat users are interested in downloading this data, please contact me.

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FORident Software is pleased to announce the release of HemoSpat v1.8 for Mac OS X 10.9-10.10 [64-bit Intel], Windows 7, Windows 8, and Windows 8.1.

This release includes a new Point Select tool to allow some stain selection within HemoSpat.

There are several other changes and fixes as well. For download links and a more complete list of changes, please see the release notes.

Note that the supported OS versions have changed with this release. HemoSpat is now supported on Mac OS X 10.9 & Mac OS X 10.10 and Windows 7, Windows 8, and Windows 8.1.

HemoSpat - New Point Select Tool

HemoSpat – New Point Select Tool

Special thank you to Staff Sergeant Gord Lefebvre of the Ontario Provincial Police (OPP) for his help testing and giving feedback on the point select tool. I’d also like to thank the participants in Gord’s study on the new feature which he will be presenting at the IABPA conferences in Rome, Italy and Fort Worth, Texas this year.

As always we look forward to hearing your feedback and suggestions!