Ok What's Going on Here?!

I get a call the other day from (123) 456-7890 so I'm a little freaked out, especially in my line of research in cyber-security/crime. Normal people don't usually spoof their numbers so I don't answer it. I mean, people usually do this for threats or just generally up to no good (I busta your phone busta, busta! - The Big Hit). That person leaves a message so I'm even more weirded out. Turns out it's a computer crimes law enforcement contact of mine. Spy stuff. Cool. *whew*