BATON ROUGE, La. (AP) -- Louisiana State Police say four Department of Public Safety employees should be disciplined and security protocols strengthened after two trusties escaped in March.

Troopers launched internal investigations to determine how Ricky Wedgeworth and Darian Pierce fled the agency's headquarters while on work detail March 4.

Superintendent Col. Mike Edmonson tells The Advocate two parallel investigations looked into whether the men were assisted in their escape and reviewed the State Police Trusty Program's policies and procedures.

Authorities say Wedgeworth and Pierce escaped in a DPS van, then they allegedly carjacked and killed David Cupps, an Ohio businessman, in Vicksburg, Miss., before being captured March 14 in Tennessee.

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