  Using the self-analyzing decay of the $\Lambda$, the longitudinal spin
transfer $D_{LL'}$ to the hyperon from a polarized electron beam scattering off
an unpolarized proton target can be determined. For $\Lambda$s produced in the
current fragmentation region, this quantity is proportional to the helicity
dependent fragmentation function $G_1^\Lambda$ and can provide insight into the
spin structure of the $\Lambda$. Currently, limited experimental data on
$D_{LL'}$ cannot discriminate between different models of $\Lambda$ spin
structure. This contribution reports on the status of the ongoing analysis of
the longitudinal spin transfer using data taken by the CLAS12 spectrometer at
Jefferson Lab with a 10.6 GeV polarized electron beam. We also report on the
novel use of Graph Neural Networks (GNNs) to identify signal events.
