( CNN) With the recent criminal indictment of 12 Russian intelligence agents, the special counsel’s role made very clear it has a treasure trove of informing its investigation into Russia’s interference in the 2016 general elections. What’s less evident is how long Robert Mueller will continue his work.

The indictment could be the high point for his crew. Or it could be simply the crest of one of various coming waves.

An investigative interrogation of President Donald Trump, likely seeing Mueller’s probe into whether the President stymie justice, still hangs in the air. So do the legs of the investigation concerning onetime expedition chair Paul Manafort’s role on the campaign, and implying onetime national certificate adviser Michael Flynn’s cooperation with investigators.

Stone: Imagine I’m maybe being in indictment