[Suicide Junkie]

The starbase problem is the same with me and a friend.I blew him into shrapnel using tachyon cannons and using the hit and run method.When I went back to freeport my contact doesn't respond

Check your mission list...
Did you succeed or fail yet?

If so, where were you supposed to meet your contact afterwards?
It is freeport station quite often, but it may be different in this case.