this time could it be zach ephron and the rock running shirtless on the beach? >> we're penatonix. ♪ ♪ >> if you're suffering from constipation or irregularity. powders may take days. try dulcolax. gentle overnight relief unlike miralax. designed for dependable relief. miralax. designed for dependable relief. >> number one in 60 seconds. ♪ ♪ ♪ ♪ >>> good evening. tonight in one of america's most popular and iconic national parks a murder mystery. the suspect is not a man but a bear. authorities believe they haveer taken down one person and raised concern in yellowstone at the height of the tourist season. >> reporter: bear encounters captured on camera in yellowstone with alarming frequency this summer. >> last evening on the driver's side window and stuff had paw prints smeared across it. >> reporter: not with old faithful's regularity, but enough to put park visitors on high alert. >> i don't like all of the bear stories i've been hearing. >> reporter: this mother black bear caught charging tourists to protect her cubs. >> there is a bear on my car

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this time could it be zach ephron and the rock running shirtless on the beach? >> we're penatonix. ♪ ♪ >> if you're suffering from constipation or irregularity. powders may take days. try dulcolax. gentle overnight relief unlike miralax. designed for dependable relief. >> number one in 60 seconds. >>> good evening. tonight in one of america's most popular and iconic national parks a murder mystery. the suspect is not a man but a bear. authorities believe they haveer taken down one person and raised concern in yellowstone at the height of the tourist season. >> reporter: bear encounters captured on camera in yellowstone with alarming frequency this summer. >> last evening on the driver's side window and stuff had paw prints smeared across it. >> reporter: not with old faithful's regularity, but enough to put park visitors on high alert. >> i don't like all of the bear stories i've been hearing. >> reporter: this mother black bear caught charging tourists to protect her cubs. >> there is a bear on my car. oh, my gosh. >> reporter: this family in their car, ter

this time could it be zach ephron and the rock running