article_snippet.sent: Scroll down for video .
article_snippet.sent: Authorities launched sea, land and air searches with the help of Kemah, Nassau Bay, Seabrook police and the U.S. Coast Guard.
article_snippet.sent: We would like to thank all the police, fire, federal agencies and Texas Equusearch that assisted We during this tragic incident.'
article_snippet.sent: Kemah police said Kemah police hope that surveillance video from boats on the Kemah Boardwalk Marina in Texas could provide further information about exactly what happened.
article_snippet.sent: The family had been working on The family boat ahead of a trip to the Caribbean, KPRC2 reported.
highlights_snippet.sent: Police will review nearby surveillance footage to determine what happened .