A Tucson man arrested last month after he allegedly robbed a cabdriver at knifepoint was indicted Tuesday on two robbery charges in that case, and he was also indicted in four other robberies.

Michael Sean Pitts, 37, is accused of robbing people Jan. 12, 13, 19, 23 and 26, resulting in a total of nine counts of armed robbery, aggravated assault with a deadly weapon and robbery.

In the Jan. 19 robbery, Tucson police said, Pitts flagged down the cab in the 200 block of North Fourth Avenue at about 9:15 p.m. and asked for a ride to North Ninth Avenue and West Lee Street. When the cab arrived at the destination, Pitts "put a knife to the cabdriver's ribs and demanded money."

Pitts was spotted near North 10th Avenue and West Adams Street on Feb. 6 and arrested without incident.

Detectives noticed similarities between the Jan. 19 incident and the other robberies, and a follow-up investigation confirmed their suspicions Pitts was involved in all of them, Tucson police Sgt. Chris Widmer said Thursday.

Pitts is accused of robbing a clerk at The Party House, 5689 E. 22nd St., on Jan. 12 and a clerk at the Circle K at 2701 N. Oracle Road on Jan. 13. The victims of the incidents on Jan. 23 and Jan. 26 were both cabdrivers who had picked Pitts up as fares, Widmer said.

The driver in the Jan. 26 incident picked Pitts up from the same location as the Jan. 19 victim, Widmer said.

The victim in The Party House incident initially thought Pitts was hiding a gun under his shirt and attacked him with a utility knife when he realized it wasn't a gun, Widmer said. No blood was found at the scene, however.

Pitts fled with cash from the convenience store and with cash, cellphones and car keys in the taxicab incidents, Widmer said.

Pitts remains in the Pima County jail on $50,000 bail.

He is scheduled to be arraigned March 1 in Pima County Superior Court.

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