Suicide could be a likely cause now.
Taken from avcom.co.za:
Email/news in Mozambique going around saying is was suicide. Apparently, one of the pilots, had two kids die two weeks earlier and had a marriage that was on the rocks. Asked the other pilot to get something and locked the door. Still doesn't explain the RoD. Will do some more digging..
No mechanic malfunction in air crash - probe
The Namibian - No mechanic malfunction in air crash - probe (News | Namibia)
A Namibian newpaper reports the below in this article
Vliegramp: Span soek vir 'onwettige inmenging' | Republikein.com.na
The text below is written in a kind of Dutch language spoken in parts of Namibia and South Africa. What is written is this:
The team (doing the investigation into cause of the crash) now shifts their research from a mechanical cause to issues with flight operations.
This includes the crew and other people involved in operating the flight.
We like to determine if illegal activities are the cause of the accident.
A question by journalist if this means sabotage or a bomb could be the cause of the accident, the leader of the investigation team said "absolutely not"
“Die span verskuif dus nou hul fokus van moontlike meganiese probleme na probleme met die vlugbedrywighede. Dit sluit die bemanning of enige ander mense betrokke by die vlugen sy bedrywighede in. Ons wil vasstel of onwettige optrede dalk die oorsaak was.”
Op ’n vraag of hy hiermee sabotasie of ’n bom bedoel, het Nengola gesę daar is nie “sprake van so iets nie”