> > I learned his real name and used it to track down an old friend of his to ask for help
You left out the adverbial phrase. The whole sentence is
> When he reached out to my company six months later to apply for a job, I learned his real name and used it to track down an old friend of his to ask for help — but the friend told me he was afraid to intervene because he didn’t want to become a target himself.
When the stalker applied for a job, additional details may have become available to the OP, potentially including personal references (i.e. "old friend".)
You left out the adverbial phrase. The whole sentence is
> When he reached out to my company six months later to apply for a job, I learned his real name and used it to track down an old friend of his to ask for help — but the friend told me he was afraid to intervene because he didn’t want to become a target himself.
When the stalker applied for a job, additional details may have become available to the OP, potentially including personal references (i.e. "old friend".)