A day after revelations that the Titan submersible imploded, officials searched the ocean floor for evidence and grappled Friday with vexing questions about who is responsible for investigating the international disaster. A formal inquiry has not yet been launched because maritime agencies are still busy searching the area where the vessel fell apart, the U.S. Coast Guard said Friday. Debris was located about 12,500 feet (3,810 meters) underwater, several hundred feet away from the Titanic wreckage it was on its way to explore. The U.S. Coast Guard led the initial search and rescue mission. MORE: https://www.wtsp.com/article/news/nation-world/cause-of-fatal-titanic-sub-implosion-under-investigation/507-2fe2c386-5785-4c02-8352-9124b9077ac0 ►Subscribe: https://on.wtsp.com/youtube ►Website: https://www.wtsp.com/ ►Facebook: https://facebook.com/10TampaBay ►Twitter: https://twitter.com/10TampaBay