Tenant changed the locks

[Paula Steimel]

So...my tenant has faithfully paid the rent and utilities.  The lease is up April 1st, and the tenant asked to extend until May 1st.  I had no problem with this. Background is that this tenant has always asked to have notice and be present when I come for repairs.  However, I asked to schedule a walk-through to look for any repairs/updates needed in anticipation of showing for next tenant (with two weeks notice), arrived and found the locks had been changed and garage door opener also did not open the garage door. Security cameras were in place facing out from the front window. In this situation, do I keep calm and play things out or immediately see about filing an eviction?