it's only a possibility
itachi mentions a uchiha ancestor who made the uchiha police force
this uchiha would have been around tobirama's age so he would be pretty old and could be dead
or he could have died in the uchiha massacre if he were to somehow be alive or was edo tensei'd he would know a lot.
obito could have been lying to sasuke about tobirama or twisting the truth to manipulate sasuke
hiruzen said that the uchiha were comrades in arms and tobirama was his sensei
itachi mentions a uchiha ancestor who made the uchiha police force
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or he could have died in the uchiha massacre if he were to somehow be alive or was edo tensei'd he would know a lot.
obito could have been lying to sasuke about tobirama or twisting the truth to manipulate sasuke
hiruzen said that the uchiha were comrades in arms and tobirama was his sensei
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