it was firefighter sam dreher.he paramedics immediately airlifted him to the nearest trauma center as word of the shooting spread. >> and it's danielle. she's screaming into the phone. you have to come. he's been shot. he's been shot. and i said who's been shot? and she screams out sam. >> cindy jumped in her car to be at her brother's side. a thousand questions swirled through her mind. why sam? who shot him? and why was he at that apartment complex? >> a firefighter gunned down. but this seemed like more than just a random shooting. . >> coming up >> there's some infidelity going on and there's a reason a cause for concern. . >> when "dateline" continues. >>> continues >> welcome to allstate. ♪ ♪ here, safe driving saves more than just your cargo. ♪ ♪ safe driving saves you 40% with drivewise. ♪ ♪ the safer you drive, the more you save with allstate. click or call for a quote today. ♪ ♪ i'm the latest hashtag challenge. and everyone on social media is trying me. i'm trending so hard that “hashtag common sense” ca