In this case: Email vs Linkedin?
Sent a LinkedIn Inmail to an alumni of my teaching program (think Teach for America, with waaaay less prestige and located internationally) about 6 months ago to set up an informational call. He responded, three weeks later with a quick message saying he'd love to talk, when is good, etc. I responded the next day with times/dates and saying I was flexible and he never responded to that.
I am in my last year on the program and looking to get a little more aggressive in my looking. He is an MD, so pretty high up and when I googled his name, it popped up on a paper he'd written for the firm that also had his email address.
Should I email him or LinkedIn message him? If I email him, I might have to answer the awkward "how did you find my email?" question...