When establishing liability and who is at fault, a tactic that attorneys will use is "prior knowledge". This is the exactly what is happening in Texas. Apparently the parents of a deceased teenager are suing the city of Dallas, Apple, and AT&T claiming that they were negligible for not using technology that could have accurately located their son when 911 was called on an overdose. Another proof point that the expectations of the general public are very different from the facts and reality. Who would you put the blame on?