Does honor still exist in the military?

Was he murdered? Colonel Ted Westhusing, a leading scholar on military ethics and honor, received an anonymous complaint that a private security company he oversaw had cheated the U.S. government and committed human rights violations. Westhusing confronted the contractor and reported the concerns to superiors. A few weeks later, he was found dead. The Army claimed he committed suicide. LA Times.

Men of honor don't kill themselves when they've done nothing wrong. Men of honor don't kill themselves so that their son back home is left fatherless and without financial support. This smells of a cover-up. Col. Westhusing only had one month left before he returned and taught at West Point again. There is no point in commit suicide.

The Generals claimed that the allegations the Colonel reported were unfounded. If it were truly unfounded, why did he have to be silenced permanently? Conversely, why would he kill himself if the allegations were unfounded?