I'm not sure if this is bed bug feces or mold. Any ideas? Please advise.
https://drive.google.com/file/d/0B3YPYRFgBmHcUVhoc1BqVG5lS1k/view?usp=sharing
https://drive.google.com/file/d/0B3YPYRFgBmHcY2ZjUlcxWWNVd1k/view?usp=sharing
https://drive.google.com/file/d/0B3YPYRFgBmHcWlNJeHA4cFRxeU0/view?usp=sharing
https://drive.google.com/open?id=0B3YPYRFgBmHcWk5JMkJnM21ZUkE