Vicki Brady grilled at first public appearance since returning from overseas as SA police say call to triple zero failed before deathFollow our Australia news live blog for latest updatesGet our breaking news email, free app or daily news podcastTelstra has admitted it knew of the dangers of a failure of its time systems and is now investigating why backup measures failed to stop this weeks outage, as its chief executive says she’s “deeply sorry” about its impacts.It came as South Australian police said an investigation was under way into whether a death during the outage can be linked to problems in calling triple zero, despite Telstra claiming it has no record of any failed call from family members. Continue reading...