Kitty, I was thinking about foul play too. But I'm wondering, when LE says there is no evidence of foul play, do they mean only that.....or does it mean they have evidence of attempted suicide?
I've had trouble reconciling an attempted suicide happening at the end of a walk with her mother. I mean, why not do it alone at home and why put your mother in that awkward position with no information? It makes me wonder if her mother was living with her - either temporarily or permanently. As another poster said upthread, someone who is intent on suicide first needs to find the time and space to be alone for a few minutes and maybe this was the only way to achieve that if family members lived in the house.
Lastly, given her accomplishments, Tamara doesn't strike me as someone who would leave loose threads as to her intent or location. I know she may not have been thinking logically, but I'd think she would leave a letter behind. I'm not sure if a lack of a reported letter makes foul play more likely but it's something to consider. Of course, LE is under no obligation to report what they may have found in her home.
Clearly I have no answers but am inclined to believe to this is a suicide. It would be helpful to know what the park cameras referenced by Victor upthread would reveal.