MADISON, Wis. (AP) — The warden at a troubled Wisconsin prison will step down later this month amid lockdown conditions, an ongoing federal investigation and multiple inmate deaths.

Waupun Correctional Institution Warden Randall Hepp announced his resignation on Tuesday, the Wisconsin State Journal reported. The newspaper obtained an email Hepp sent to prison staff in which he wrote his decision wasn’t easy but he believes it will serve the institution well. He added that the prison has moved closer toward improving safety.

State Department of Corrections spokesperson Beth Hardtke told The Associated Press on Sunday that Hepp actually announced his retirement, not his resignation. She did not respond to a request for a copy of his Tuesday email. Gov. Tony Evers spokesperson, Britt Cudaback, referred questions to DOC officials.

Brad Mlodzik, who previously worked as deputy warden at Waupun, will take over as warden there on June 30, the State Journal reported.