Remember the purse is on the other side of the fence from the bikes. This means either the girl was taken from that place and it was dropped, or it was left there (or thrown there) by someone else. A girl would not just 'lose' her purse. The purse location is the key IMHO.
The purse being left there tells me she did not go willingly to wherever she is.
TG never mentions the purse. My question was about adamant he was about his time calculation, and if so, where does he indicate that he is positive that is the case...in an article? In a blog? I still believe the girls were abducted from the trail at this time until someone proves they weren't. A girl would place a purse down on the lake side of the fence after entering through the fence gate (which was open) and perhaps gone over to the shoreline for some reason....then something happened....whatever happened after 12:15 has not been revealed, so it is just hanging out there... Nothing between 12:15 and 3:58 has been publicly released to this day. LE says they don't know who TG is...'
JMHO (I don't believe TG did anything wrong..no one knows what happened)